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2009-11-11 02:30 UTC PrimeGrid's Challenge series continues with the Giving Thanks Challenge. Please come join us in a celebration of PrimeGrid's users. In this season of giving thanks, we wish to thank you, the user, for another AMAZING year of crunching. A 24 hour (13-14 November) Challenge is being offered on PrimeGrid's Prime Sierpinski Problem/Seventeen or Bust (sieve) application. Builds are available for Mac, Linux and Windows. For more information, please see this forum thread. 2009-11-10 03:40 UTC The Generalized Fermat Prime Search has been launched in PrimeGrid's PRPNet. This is a search for primes of the form b^2^n+1. They are named after Pierre de Fermat, considered to be one of the greatest French mathematicians of the seventeenth century. For more information, please visit this forum post. 2009-11-09 05:20 UTC A new record AP24 (Arithmetic Progression of 24 primes) has been found. It is the largest known AP24. It has an ending term of 98090802848850701 surpassing the old record of 93004136079654607. The finder is Marcus Rosario (Ritzgit) of the United States. He is a member of the Gay USA team. The progression is written as 4687877159107031+18203167*23#*n for n=0..23. It was found in the AP26 Search. For more details on this find and the AP26 search, please see this forum post. 2009-11-05 05:05 UTC A new record AP24 (Arithmetic Progression of 24 primes) has been found. It is the largest known AP24. It has an ending term of 93004136079654607 surpassing the old record of 90769015637524109. The finder is Chris Wingate (skinny9699) of the United States. He is a member of the Ubuntu Linux team. The progression is written as 1948053460212667+17745794*23#*n for n=0..23. It was found in the AP26 Search. For more details on this find and the AP26 search, please see this forum post. 2009-11-01 15:15 UTC A victory for the legacy systems!!! A new record AP24 (Arithmetic Progression of 24 primes) has been found. It is the largest known AP24. It has an ending term of 90769015637524109 surpassing the old record of 84418532426419063. The finder is Ian Dickinson (Vato) of the United Kingdom. He is a member of Team-Goobee.org. It was found by an Intel Pentium III @ 1266MHz running 32 bit Linux!!! The progression is written as 3634080452156039+16981607*23#*n for n=0..23. It was found in the AP26 Search. For more details on this find and the AP26 search, please see this forum post. 2009-10-10 04:45 UTC The results are final. Over 1,490,000 tasks were completed by 200 teams and 1361 individuals resulting in over 100 new "Top 5000" primes. Congratulations to SETI.Germany as the top team and [SG]marodeur6 as the top individual. Many thanks goes out to everyone who participated!!! For more stats and information, please see this forum post. 2009-10-10 03:15 UTC Several new AP24's (Arithmetic Progression of 24 primes) have been found...two of which are records. They were found in the AP26 Search. For more details on these finds and the AP26 search, please see this forum thread. 2009-09-28 16:35 UTC PrimeGrid's Challenge series continues with the Harvest Festival Challenge. Please come join us in a Fall harvest of primes. A 48 hour (02-04 October) Challenge is being offered on PrimeGrid's Proth Prime Search (LLR) application. Builds are available for Linux, MacIntel and Windows. For more information, please see this forum thread. 2009-09-28 14:20 UTC Today we experienced an unexpected outage lasting several hours. It was caused by database crash which has since been repaired. The server might be a little slow while it deals with work backlog, but all requests should go through eventually. We are very sorry for the inconvenience. 2009-09-19 00:15 UTC A new record AP24 (Arithmetic Progression of 24 primes) has been found. It is the largest known AP24. It has an ending term of 82761689028005821 surpassing the old record of 81531202836675089. The finder is Kevin Erickson (Kevin Erickson) of the United States. He is a member of the BOINCstats team. The progression is written as 10307159737232191+14120563*23#*n for n=0..23. It was found in the AP26 Search. For more details on this find and the AP26 search, please see this forum post. 2009-09-08 04:45 UTC PrimeGrid has found a record AP25 (Arithmetic Progression of 25 primes). This is PrimeGrid’s third AP25 and only the fourth known. It has an ending term of 38271649410634609 surpassing the old record of 37814740008933889. The finder is Keith Dale (GreenFish) of the United States. He is a member of team SETI.USA. The progression is written as 18162964758258289+3755664*23#*n for n=0..24. It was found in the AP26 Search. For more details on this find and the AP26 search, please see this forum post. 2009-09-03 00:00 UTC Congratulations to Ben Maloney (paleseptember) who discovered the megadigit probable prime 2^4583176+2131. At 1,379,674 decimal digits, this is the first known probable prime with over a million digits. It should soon appear as the new probable prime record at the website of Henri and Renaud Lifchitz, PRP Records: Probable Primes Top 10000. Ben is participating in the project "Five or Bust" - The Dual Sierpinski Problem. This project is outside of PrimeGrid and can be located in the Mersenne forum. For additional information about this project, please see the Welcome to "Five or Bust!" thread. There are only 2 remaining sequences. To help with PRP testing, see this thread. To help with sieving, see this thread. 2009-09-02 14:40 UTC PrimeGrid has found a record AP25 (Arithmetic Progression of 25 primes). This is PrimeGrid’s second AP25 and only the third known. It has an ending term of 37814740008933889 surpassing the old record of 15523154536267043. The finder is Jochen Beck (dh1saj) of Germany. He is a member of team SETI.Germany. The progression is written as 20919497549238289+3155495*23#*n for n=0..24. It was found in the AP26 Search. For more details on this find and the AP26 search, please see this forum post. 2009-08-25 12:35 UTC Another record AP24 (Arithmetic Progression of 24 primes) found by a PS3. It is the largest known AP24. It has an ending term of 81531202836675089 surpassing the old record of 60739320360456407. The finder is Bryan Little (mfl0p) of the United States. He is a member of the [H]ard|OCP team. The progression is written as 13678065943093049+13223804*23#*n for n=0..23. It was found in the AP26 Search. For more details on this find and the AP26 search, please see this forum post. 2009-08-17 12:10 UTC The Dog Days are upon us! PrimeGrid's Challenge series continues with the Dog Days of Summer Challenge. Please come join us in ushering an end to the hot sweltering days of summer. A 5 day (18-23 August) Challenge is being offered on PrimeGrid's Woodall Prime Search (LLR)) application. Builds are available for Linux and Windows. For more information, please see this forum thread. 2009-08-16 15:55UTC The long awaited debut of the Sophie Germain Prime Search has finally arrived. To participate, select Sophie Germain Prime Search (LLR) on your PrimeGrid preferences page. For more information, please see this forum post. 2009-08-14 01:50 UTC We are attempting to reach two BOINC users who have made significant prime discoveries at PrimeGrid. They are both active in other BOINC projects. Therefore, we would like to make a request to the entire BOINC community for help in finding these individuals. (KE7AAR) (UPDATE: Found) of the United States and team BOINC Synergy, shares credit for the World Record Twin Primes. (spinner@) of Japan and Team 2ch is the finder of the World Record Cullen Prime. If you have contact with either of these individuals, please have them check their BOINC emails or private messages in PrimeGrid's forum. Several attempts have already been made through these channels. Additionally, if you have any information that might help us in contacting these individuals, please contact us here: http://www.primegrid.com/contact.php (Update 2009-08-15 18:00 UTC) KE7AAR has been contacted, thanks to everyone for help! 2009-08-14 01:40 UTC The Cullen/Woodall Sieve is active again. Both prime searches have reached n=7M in their primality testing. Therefore, combined sieving has begun on the next range of 10M < n < 25M. To participate, select Cullen/Woodall Prime Search (Sieve) on your PrimeGrid preferences page. 2009-08-09 14:40 UTC Congratulations to SG Grid, for becoming the first single user account to reach 50M cobblestones at PrimeGrid. An outstanding and amazing accomplishment after being here for less than 8 months. 2009-08-06 16:20 UTC The search is finally over!!! The Twin Primes have been discovered!!! Verification was quickly completed and the appropriate users are being contacted. Credit will be shared between the finder, top producer in terms of M, top producer in terms of primes found, and top siever. The Twin Primes were actually returned on the SAME!!! day as the Cullen Prime but were overlooked in the excitement of the Cullen. Work generation has been terminated so please select another project if TPS was your only project. The project will remain active until all outstanding work has been returned and credited. Stay tuned for more details. 2009-08-05 02:45 UTC On 25 Jul 2009 1:11:48 UTC, PrimeGrid's Cullen Prime Search found another World Record Cullen Mega Prime: 6679881·26679881+1 The prime is 2,010,852 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 15th overall. It is the largest known Cullen prime and the largest found Mega Prime using LLR. This remarkable discovery comes less than 4 months after the last prime and is only the 16th known Cullen prime. Contact with PrimeGrid participant (spinner@) has not been returned. However, the participant is from Japan and is a member of Team 2ch. The prime was found using an Intel Xeon L5420 @ 2.50GHz with 6 GB RAM running Windows XP Professional. This computer took about 71 hours 58 minutes to complete the primality test. More details to come after contact is made. 2009-08-03 17:05 UTC PrimeGrid has found a new AP24 (Arithmetic Progression of 24 primes)...the first by a PS3!!! The finder is Paolo Bassi ([FVG] bax) of Italy. He is a member of team BOINC.Italy. The progression is written as 25545151920212759+1140241*23#*n for n=0..23. It was found in the AP26 Search. For more details on this find and the AP26 search, please see this forum post. 2009-08-01 15:40 UTC As unbelievable as it may sound, another Cullen Mega Prime has been discovered!!! It is only the 16th known Cullen prime. It is also a top 15 prime at over 2M digits and the largest found by LLR. Additionally, it is PrimeGrid's largest prime to date. The discoverer is from Japan and a member of Team 2ch. Verification is in progress. Stay tuned for more details. 2009-07-30 14:10 UTC PrimeGrid has found a new AP24 (Arithmetic Progression of 24 primes). The finder is Jeffrey D Sessler (Tostada) of the United States. He is a member of team Ars Technica. The progression is written as 20187352211709911+1799216*23#*n for n=0..23. It was found in the AP26 Search. For more details on this find and the AP26 search, please see this forum post. 2009-07-24 18:35 UTC While there were no AP24+ found during the Challenge, two AP24's actually were found in the hours leading up to the start. The finders are Andreas Mohr (andmore) of Germany and Tina Kent (Penguirl) of the United States. Andreas' progression is written as 19471368812966089+410682*23#*n for n=0..23 and Tina's progression is written as 20909681071069667+234797*23#*n for n=0..23. Both were found in the AP26 Search. For more details on these finds and the AP26 search, please see the following forum posts: Andreas' AP24 | Tina's AP24. 2009-07-24 14:40 UTC Congratulations to SETI.Germany, the first team to reach 100M cobblestones at PrimeGrid...doubling their 50M cobblestone achievement in only 5 1/2 months!!! Is 150M in their sights by year's end? We'll have to wait and see. Again, congratulations! :) 2009-07-19 18:15 UTC PrimeGrid has found a record AP24 (Arithmetic Progression of 24 primes). It is the largest known AP24. It has an ending term of 62869009767207037 surpassing the old record of 60739320360456407. The finder is Jan-Cornelius Molnar (janm) of Germany. The progression is written as 10317962076055027+10241601*23#*n for n=0..23. It was found in the AP26 Search. For more details on this find and the AP26 search, please see this forum post. 2009-07-18 18:35 UTC We now have AP26 application for PlayStation 3. You may wish to check the forum thread in order to get it running at full speed. Thanks to mfl0p. 2009-07-18 18:30 UTC For those of you using Twitter, you can now follow PrimeGrid and watch the progress of recent findings in the AP26 Search. PrimeGrid Twitter on Web: http://www.twitter.com/primegrid. Thanks to Lexs for implementing the updates script. 2009-07-18 02:05 UTC PrimeGrid has found a new AP24 (Arithmetic Progression of 24 primes). The finder is Carsten Hartwig (SG Arsenic) of the United Kingdom. He is a member of the SETI.Germany team. The progression is written as 19516186145019209+313705*23#*n for n=0..23. It was found in the AP26 Search. For more details on this find and the AP26 search, please see this forum post. 2009-07-14 18:25 UTC PrimeGrid's Challenge Series continues with the New Moon Challenge. Please come join us in ushering in July's New Moon along with a new project to the Challenge Series. A 24 hour (21 July – 22 July) Challenge is being offered on PrimeGrid's AP26 (Arithmetic Progression of 26 primes) application. Builds are available for Linux, Mac, Windows, PS3, & Solaris. For more information, please see this forum thread. P.S. Also, the "most significant" Solar Eclipse this century is occuring on 22 July. :) See forum thread for more details. 2009-07-12 23:35 UTC PrimeGrid has found a new AP24 (Arithmetic Progression of 24 primes). The finder is Bryan Little (mfl0p) of the United States. He is a member of the [H]ard|OCP team. The progression is written as 7979661543967237+9936237*23#*n for n=0..23. It was found in the AP26 Search. For more details on this find and the AP26 search, please see this forum post. 2009-07-10 14:15 UTC PrimeGrid has found a record AP24 (Arithmetic Progression of 24 primes). It is the AP24 with smallest known start. It has a starting term of 39421708111691 decreasing the old record of 167806194923077. The finder is Mark Codding (Narwhal) of the United States. He is a member of Team Picard. The progression is written as 39421708111691+9740894*23#*n for n=0..23. It was found in the AP26 Search. For more details on this find and the AP26 search, please see this forum post. 2009-07-06 03:45 UTC PrimeGrid has found a new AP24 (Arithmetic Progression of 24 primes). The finder is Paweł Feruś (mindc) of Poland. He is a member of the BOINC@Poland team. The progression is written as 5531900872160491+9383796*23#*n for n=0..23. It was found in the AP26 Search. For more details on this find and the AP26 search, please see this forum post. 2009-07-04 13:25 UTC PrimeGrid has found a record AP24 (Arithmetic Progression of 24 primes). It is the largest known AP24. It has an ending term of 60739320360456407 surpassing the old record of 60312982868878297. The finder is Carsten Hartwig (SG Arsenic) of the United Kingdom. He is a member of the SETI.Germany team. The progression is written as 13432401425380607+9219580*23#*n for n=0..23. It was found in the AP26 Search. For more details on this find and the AP26 search, please see this forum post. 2009-07-01 06:30 UTC We have released a version of AP26 application for 64bit Solaris (on AMD x86_64 or Intel EM64T CPUs, platform name x86_64-pc-solaris). This is our first application for this platform, which also makes AP26 an application that runs on the most platforms. Thanks to Gerrit Slomma for building the app! Psst... the PS3 version is coming ;) 2009-06-30 19:50 UTC PrimeGrid has found a record AP24 (Arithmetic Progression of 24 primes). It is the largest known AP24. It has an ending term of 60312982868878297 surpassing the old record of 25490711550130537. The finder is (AFXTBA Pitheque) of France. He is a member of the L'Alliance Francophone team. The progression is written as 14992521666441877+8832442*23#*n for n=0..23. It was found in the AP26 Search. For more details on this find and the AP26 search, please see this forum post. 2009-06-20 02:05 UTC Congratulations to Worldwide Center of Mathematics, owner of the new top host at PrimeGrid. While this position has changed many times in the past, what makes this occasion unique is that this is the first time the top host is a Mac!!! EDIT: The above is in terms of RAC. In terms of total credit, UL1 holds a commanding lead of over 5M cobblestones with this host. 2009-06-15 03:25 UTC 321, PPS, and PSP sieves now have application support for Mac OS X 10.4 running on Intel and 10.5 running on 64bit Intel. PPS sieve also offers application support for Mac OS X 10.3 running on PPC. 2009-06-13 04:20 UTC Congratulations to The Great Internet Mersenne Prime Search (GIMPS)! On April 12th, Odd Magnar Strindmo of Norway discovered the 47th known Mersenne prime, 2^42,643,801-1. It is the second largest known prime at 12,837,064 digits, only 141,125 digits smaller than the Mersenne prime found last August. The prime was independently verified June 12th. For more information, please visit the GIMPS site. Again, congratulations!!! 2009-06-11 03:45 UTC Just over 24 hours until the start of PrimeGrid's "Birthday/Summer Solstice Challenge". A 9 day Challenge is being offered on the Prime Sierpinski Problem (LLR) application. Long Challenge, long WU's, but the rewards are greater...250 Challenge points goes to the winner and should a prime be found, it will be a Mega Prime. For more information, please see this forum post. 2009-06-07 06:30 UTC PrimeGrid's Challenge Series continues with the "Birthday/Summer Solstice Challenge". A 9 day Challenge is being offered on the Prime Sierpinski Problem (LLR) application. We are celebrating PrimeGrid's 4th birthday on 12 June...culminating 21 June on the Summer Solstice. It seems fitting that the sun will shine the longest for the project with the longest WU. For more information, please see this forum post. 2009-05-29 22:30 UTC PrimeGrid has found two new records for AP22 and AP23 (Arithmetic Progression of 22 primes and 23 primes respectively). They are the smallest known starts for each of their classifications. The finders are Jacek Kotnowski (sosnahojna - team BOINC@Poland) of Poland for the AP22 record and Eric Markle (Nikodemus - team BOINCstats) of the United States for the AP23 record. They were found in the AP26 Search. For more details on these finds and the AP26 search, please see these forum posts - AP22, AP23. 2009-05-20 18:00 UTC Today, PrimeGrid surpasses the 1 Billion mark in cobblestones. From meager beginnings on 12 June 2005 to now, a tremendous amount of work has been accomplished...6 mega primes, 3 Fermat Number divisors, and over 4000 titanic primes have been discovered. Congratulation goes out to the entire community for an incredible achievement. Thank you all for your support! 2009-05-17 15:15 UTC We are going to have a one to two hour downtime tomorrow, May 18, at about 12:00 GMT, because the servers have to be moved to a different rack as the datacenter is upgrading their infrastructure. 2009-05-15 01:30 UTC Congratulations to SG Grid, for becoming the new points leader at PrimeGrid. What makes this accomplishment more amazing is that it was done in less than 5 months. The two projects that have benefited the most from this achievement are the Twin Prime Search and the Prime Sierpinski Problem. Again, congratulations! 2009-05-13 18:15 UTC Watch a TEDx Warwick talk by Francois Grey about citizen cyberscience, which also mentions PrimeGrid (at about 8:20) or download the video (215MB). 2009-05-11 9:00 UTC We have released first PrimeGrid application for Mac OS X, Arithmetic Progression of 26 Primes Search (AP26). Mac OS X 10.3 running on PPC, 10.4 running on Intel and 64bit 10.5 running on Intel are supported. Thanks to Iain Bethune for compiling the apps. 2009-05-06 18:30 UTC PrimeGrid has found a record AP24 (Arithmetic Progression of 24 primes). It is the largest known AP24 as well as the AP24 with smallest known start. The finder is Andreas Kobara (Lexs) of Germany. He is a member of the Gentoo Linux Users Everywhere team. The progression is written as 167806194923077+4935146*23#*n for n=0..23. It was found in the AP26 Search. For more details on this find and the AP26 search, please see this forum post. 2009-05-05 00:15 UTC Congratulations to L'Alliance Francophone, for reaching the 50M cobblestones level at PrimeGrid. They are only the second team to accomplish this. It actually occurred during the Showers to Flowers Challenge so this is a bit belated. Again, congratulations! 2009-05-02 14:00 UTC The results are final. Over 1169T was crunched in the 48 hours of the Challenge and over 389,000 tasks were completed by 260 teams and 2092 individuals. Congratulations to SETI.Germany as the top team and [AF>XTBA>XTC] FRED as the top individual. Many thanks goes out to everyone who participated!!! For more stats and information, please see this forum post. 2009-04-29 18:00 UTC Let the "rains" begin!!! The Showers to Flowers Challenge has started. A 2 day (48 hour) Challenge is being offered on PrimeGrid's Prime Sierpinski Project (Sieve) application. For more information, please see this forum post. 2009-04-28 18:00 UTC Only 24 hours remain until it starts "raining" factors. A 2 day (48 hour) Challenge is being offered on PrimeGrid's Prime Sierpinski Project (Sieve) application. Come join us for a shower of factors in hopes to make those hidden primes bloom. :) For more information, please see this forum post. 2009-04-21 02:10 UTC On 20 Apr 2009 0:52:45 UTC, PrimeGrid's Cullen Prime Search found a World Record Cullen Mega Prime: 6328548*26328548+1 The prime is PrimeGrid's largest prime to date. It is 1,905,090 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 14th overall. It is the largest Cullen prime found and the largest found Mega Prime using LLR. The discovery was made by Dennis R. Gesker (Gesker) of the United States using an Intel Xeon E5420 @ 2.50GHz with 8GB RAM running Windows Server 2008. This computer took 32 hours 28 minutes to complete the primality test. For more details, please see the official announcement. Decimal representation of the number is also available. 2009-04-20 19:00 UTC A PrimeGrid participant has discovered a World Record Cullen Mega Prime in the Cullen Prime Search. This is a very special and rare find. It is only the 15th Cullen prime known. It is also a top 15 prime and the largest found by LLR. Additionally, it is PrimeGrid's largest prime to date. Stay tuned for more details. 2009-04-09 16:15 UTC PrimeGrid has found a record AP25 (Arithmetic Progression of 25 primes). This is PrimeGrid's first AP25 and only the second known. It is the largest AP25 having an ending term of 15523154536267043 surpassing the old record of 8132758706802551. It is also the AP25 with smallest known start 2960886048458003, the previous record being 6171054912832631. The finder is BOINC@Poland's "Super Computer" (SKB@P). It is a farm of machines funded by BOINC@Poland members. The progression is written as 2960886048458003+2346233*23#*n for n=0..24. It was found in the AP26 Search. For more details on this find and the AP26 search, please see this forum post. 2009-04-07 15:30 UTC PrimeGrid has found a record AP24 (Arithmetic Progression of 24 primes). It is the largest known AP24. It has an ending term of 19898154930924749 surpassing the old record of 19516877252820799. The finder is Pawel Stachowiak (stachu @ fiddex) of Poland. The progression is written as 7960592659339799+2326495*23#*n for n=0..23. It was found in the AP26 Search. For more details on this find and the AP26 search, please see this forum post. 2009-04-05 19:30 UTC PrimeGrid has found a "New" Arithmetic Progression of 24 primes. The finder is Pawel Stachowiak (stachu @ fiddex) of Poland. The progression is written as 6274259724784693+2522655*23#*n for n=0..23. It was found in the AP26 Search. We expect to find many more and even a few AP25's along the way to the goal of an AP26. For more details on this find and the AP26 search, please see this forum post. 2009-04-05 07:20 UTC On 3 Apr 2009 15:40:01 UTC, PrimeGrid's 321 Prime Search found another Mega Prime: 3*25082306+1 The prime is 1,529,928 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 15th overall. It is the 6th largest Proth prime found and the largest found Mega Prime using LLR. The discovery was made by Andy Brady (Andy Brady) of the United States using an Intel C2Q Q8200 @ 2.33GHz with 3GB RAM running Windows Vista. This computer took about 14 hours 7 minutes to complete the primality test. Andy is a member of the BOINCstats team. For more details, please see the official announcement. Decimal representation of the number is also available. 2009-04-04 14:10 UTC A PrimeGrid participant has discovered a Mega Prime in the 321 Prime Search! We are currently GFN divisibility testing the prime as well as awaiting contact with the discoverer. It is a top 15 prime and the largest found by LLR. Stay tuned for more details. 2009-04-02 01:30 UTC Congratulations to Eric Embling (Eric E) of the United States, the discoverer of PrimeGrid's third Fermat Number divisor in the Proth Prime Search project: 659*2^617815+1 Divides F(617813). It is the 3rd found Fermat Number divisor of 2009 and 273rd overall. It is the 6th largest Fermat Number divisor in Chris Caldwell's The Largest Known Primes Database. Incidentally, it is a new record for "weighted" Fermat Number divisors. For more information, please see this forum post. 2009-03-28 05:40 UTC PrimeGrid has found a "New" Arithmetic Progression of 24 primes. The finder is Krzysztof Koczubik (ksysju) of Poland. This is his second AP24 discovery. The progression is written as 6872932294461509+2042703*23#*n for n=0..23. It was found in the AP26 Search. We expect to find many more and even a few AP25's along the way to the goal of an AP26. For more details on this find and the AP26 search, please see this forum post. 2009-03-20 04:50 UTC The results are final. Over 550,000 tasks were completed by 148 teams and 901 individuals. Congratulations to BOINCstats as the top team and j2satx as the top individual. Many thanks goes out to everyone who participated!!! For more stats and information, please see this forum post. 2009-03-16 18:35 UTC The photo finish is in and it looks pretty clear that BOINCstats has taken the team standings and j2satx the individual standings (unofficial). What an incredible past 24 hours. Job well done everyone!!! Congratulations all around. As for the fate of the primes, you can still hear their sorrowful moans as they are hauled off to the Top 5000 list. More details to come. 2009-03-16 16:35 UTC Just under 1 & 1/2 hours remain. So far, a week's worth of primes have been found in less than 24 hours...with more still coming in. The team and individual competitions are still battling it out. A photo finish seems inevitable. Now is the time to start preparing for the conclusion. Update your clients early and update often. For more information, please see this forum post. 2009-03-16 02:10 UTC 8 hours into the Challenge and the primes are beginning to fall. The start went exceptionally well with over 40K tasks going out in 30 minutes (11630 tasks in the first 5 minutes)!!! Well done everyone. The team and individual competitions are heating up with fierce battles going on for the top spots. Looks like it's shaping up for another "down to the wire" finish. For more information, please see this forum post. 2009-03-15 00:00 UTC T-minus 18 hours and counting. The sievers have the primes on the run. The Ides of March approaches and doom is in the air for these primes. Come join us for a 24 hour Challenge on the Proth Prime Search LLR project. For more information, please see this forum post. 2009-03-14 02:00 UTC Friday the 13th has come and gone. Sadly, those elusive and unique GCW13 primes continue to elude us. Looks like Friday, November the 13th will get its chance at finding them. However, the results will be much different in just over a day and a half from now for The Ides of March Challenge. The question isn't will a prime be found...it's how many. In a tribute to the sievers, come join us for a 24 hour Challenge on the Proth Prime Search LLR project. For more information, please see this forum post. 2009-03-13 01:25 UTC Friday, March the 13th is HERE!!! And still no sighting of the elusive Generalized Cullen or Woodall base 13 primes. Will today be the day, or will we have to wait until Friday, November the 13th? Come join for a final push today. For more information, please see this forum post. 2009-03-09 04:05 UTC Friday, March the 13th, is approaching which means it's time for another "friendly" mini-challenge to find a Generalized Cullen or Woodall base 13 prime. As we discovered last time, this is no easy task. With St. Patrick's day around the corner, we'll need a little bit of that Irish Luck to come early. :) For more information, please see this forum post. 2009-03-07 03:40 UTC Congratulations to Senji Yamashita (s-yama) of Japan, the discoverer of PrimeGrid's second Fermat Number divisor in the Proth Prime Search project: 519*2^567235+1 Divides Fermat F(567233). It is only the 2nd found Fermat Number divisor of 2009 and 272nd overall. It is the 7th largest Fermat Number divisor in Chris Caldwell's The Largest Known Primes Database. Incidentally, it is a new record for "weighted" Fermat Number divisors. For more information, please see this forum post. 2009-03-06 23:10 UTC PrimeGrid has found a "New" Arithmetic Progression of 24 primes. The finder is Stefan Smietanowski (Blast) of Sweden. The progression is written as 2725131905640097+1342336*23#*n for n=0..23. This was found in the AP26 Search. We expect to find many more and even a few AP25's along the way to the goal of an AP26. For more details on this find and the AP26 search, please see this forum post. 2009-03-05 18:00 UTC The countdown has started, T minus 10 days and counting. The sievers are hard at work behind the scenes factoring out all the prime wannabe's. Doomsday is approaching the remaining candidates as there is little room left to hide. Come 15 March, GLORY will go to the finders and the primes will face their nemesis, the Top 5000 List at the Prime Pages. Be sure to catch some of that GLORY in the 24 hour Ides of March Challenge. For more information, please see this forum post. 2009-03-03 19:30 UTC The new LLR wrapper that was released two weeks ago has now been updated to be fully statically-linked. Testing has gone well in the Proth Prime Search project. Therefore, it has been released for all LLR projects which include 321 Prime Search, Cullen Prime Search, Prime Sierpinski Problem, Twin Prime Search, and the Woodall Prime Search. 32 bit Linux support continues on ALL LLR projects. Again, thanks to Geoff Reynolds who has made this build a reality! 2009-03-02 04:15 UTC If you are a prime, BEWARE the Ides of March!!! Right now, 100's of sievers are working behind the scenes to clear the path for the primality testers to find you. And on 15 March, your time is up!!! A 24 hour Challenge is being offered on PrimeGrid's Proth Prime Search (LLR) application. For more information, please see this forum post. 2009-03-01 06:55 UTC There were no surprise sprints on this last day...just a nice champagne stroll around the Champs-Elysées. Congratulations to the jersey winners: Yellow - Lennart; Green - s-yama; and Checkered - Lennart. For more details on the conclusion of the race, please see this forum post. 2009-02-26 17:45 UTC PrimeGrid has found a "New" Arithmetic Progression of 24 primes. The finder is Krzysztof Koczubik of Poland. He is a member of BOINC@Poland. The progression is written as 13785500104035967+1004314*23#*n for n=0..23. This was found in the AP26 Search. We expect to find many more and even a few AP25's along the way to the goal of a record AP26. For more details on this find and the AP26 search, please see this forum post. 2009-02-19 00:45 UTC The 321 Sieve has completed its manual effort and is now available in BOINC. Current depth is p=2P for 5M < n < 25M. This is for both +1 and -1 forms. To participate, go to your PrimeGrid preferencesand select 321 Prime Search (Sieve). It's currently available for Linux64 and Windows32/64. 2009-02-18 00:10 UTC Over half way through the Tour de Primes and Lennart continues to hold a comfortable lead. A quick look at his primes and you can see that he's taking advantage of PPSE on PRPNet. With the mountain stage coming up on the 23rd, it's not too late to reel him back in. For more information, please see Tour de Primes 2009. For information about PRPNet, please see this forum post. 2009-02-17 22:25 UTC A new LLR wrapper for Linux has been released. Along with this release, there is now Linux support for the Cullen Prime Search (LLR) and Prime Sierpinski Problem (LLR). A special thanks to Geoff Reynolds, who made this build a reality! For more information, please see this forum post. 2009-02-14 04:10 UTC We are happy to announce that PrimeGrid is partnering with 12121 Search. Similar to 321 Search (k=3), 12121 Search is searching for single k primes of the form 121*2^n-1. They have been successfully searching since 2004 and are now in the Mega Prime area. For more details on the new search, please see this forum thread. 2009-02-10 01:45 UTC The prime month competition is starting to heat up. Lennart has just recently broken away from the group and has a 3 prime lead. He has a mixture of BOINC and PRPNet primes. Is there anyone who can challenge him for the yellow jersey??? Just under 2/3's of the month remains so there's plenty of time for someone to rein him back into the peloton. For more information, please see this forum post. 2009-02-09 04:00 UTC PrimeGrid user rogue has proposed a "friendly" mini-challenge to find a Generalized Cullen or Woodall base 13 prime on or before Friday, February 13th, 2009. A most ambitious endeavor! It will take the Luck of all the Irish PrimeGrid users for this prime to be found...especially on that date. However, to the finder goes all the spoils of fame (math fame) for these elusive gems! For more information, please see this forum thread. 2009-02-08 06:15 UTC Congratulations to SETI.Germany, the first team to reach 50M cobblestones at PrimeGrid. Also, a special thanks to pschoefer, SETI.Germany's administrator at PrimeGrid, who does an excellent job managing PrimeGrid's information for such a large team. Now the race is on for 100M cobblestones...can it be reached by year's end??? and by which team??? :) 2009-01-31 23:45 UTC While the Challenge is over, the Year of the Ox is just beginning. Over 18,000 321 WU's were completed by 133 teams and 589 individuals. Congratulations to BOINCstats as the top team and WilliamWallace as the top individual. It was a GREAT start to the 2009 Challenge Series. Congratulations to everyone and thank you for participating!!! For more information, please see this forum post. 2009-01-27 21:45 UTC 24 hours into the Year of the Ox Challenge and all is well. In just this short time, BOINCstats has taken a commanding lead while the individual competition is a bit closer. It's not too late to join the fireworks in a celebration of the Chinese New Year. For more information, please see this forum thread. 2009-01-25 15:15 UTC Just over 24 hours remain until the Year of the Ox Challenge. Come join the fireworks in a celebration of the Chinese New Year, the Year of the Ox. A 5 day (26th-31st Jan) Challenge is scheduled on PrimeGrid's 321 Prime Search LLR application. For more information, please see this forum thread. 2009-01-20 19:45 UTC PrimeGrid's 2009 Challenge Series starts off with a fire cracker bang! Please come join us in the Chinese New Year, the Year of the Ox, for a 5 day (120 hour - 26th-31st Jan) Challenge on PrimeGrid's 321 Prime Search (LLR) application. The Ox is the sign of prosperity through fortitude and hard work. It is unswervingly patient, tireless in its work, and capable of enduring any amount of hardship without complaint. Sounds a lot like prime searchers. :) For more information, please see this forum thread. 2009-01-16 15:00 UTC We are seeing multiple workunit failures and trouble reports because of Symantec (Norton) antivirus marking our screensaver as a probable virus. While there is nothing we can do about it, you can exclude BOINC data directory from antivirus path, and contact Symantec telling them about the false positive. Please keep all discussions in this forum thread . 2009-01-01 15:55 UTC Congratulations to zed, the discoverer of PrimeGrid's first prime for 2009 in the Proth Prime Search project: 15*2^483098+1. Unfortunately, it was just a double check. The first "new" prime of 2009 was found by Vato, again from the Proth Prime Search project: 835*2^483718+1. 2008-12-28 18:45 UTC Congratulations to Eric Ueda, the discoverer of PrimeGrid's first Fermat divisor in the Proth Prime Search project: 651*2^476632+1 Divides F(476624). It is only the 6th found Fermat divisor of 2008 and 270th overall. It is the 8th largest Fermat divisor in Chris Caldwell's The Largest Known Primes Database. For more information, please see this forum thread. 2008-12-27 18:50 UTC PrimeGrid has added a new prime search project, an Arithmetic Progression of 26 primes. An arithmetic progression of primes is a sequence of primes with a common difference between any two successive numbers in the sequence. For example 3, 7, 11 is an arithmetic progression of 3 primes with a common difference of 4. To participate, go to your PrimeGrid preferences page and select AP26 (currently only available for 64 bit Linux). For more information, please see this forum thread. 2008-12-26 07:00 UTC PrimeGrid has added a new prime search project, the Primorial Prime Search. These primes are of the forms p#+1 and p#-1. It enters the Project Staging Area first as a manual sieving effort. Once sufficient depth has been reached, a primality testing effort will begin. For more information, please see this forum thread. 2008-12-24 15:40 UTC PrimeGrid's 2008 Challenge Series has concluded. Congratulations to SETI.Germany as the top team and lennart SM5YMT as the top individual. They are the winners to PrimeGrid's inaugural 2008 Challenge Series. For a list of other top finishers, please see this forum thread. 2008-12-24 01:10 UTC The results are in for the Winter Solstice Challenge. Thank you for your patience. The margin of victory is 0.055%. Congratulations to WilliamWallace as the top individual and BOINCstats as the top team. For more information, please see this forum thread. The crowning of the top overall finishers in PrimeGrid's 2008 Challenge Series is next. 2008-12-22 06:50 UTC The Solstice has come and gone. Twas a tough last 12 hours but we have survived the night and the sun has risen again! The Winter Solstice Challenge ended with a tremendous battle. It's still too close to call. Thank you to all who participated in what turned out to be PrimeGrid's top Challenge of the Year. It would not have been possible without your support. For more information, please see this forum thread. Stay tuned...final results will be coming soon. 2008-12-21 00:04 UTC 'tis but 12 hours left till the Solstice. The fire is burning bright and there's plenty of logs to keep it alit til the sun's return at dawn. :) The team and individual races are as tight as ever. It looks like this will go down to the wire. :) Thank you everyone for making this the most exciting Challenge yet. For more information, please see this forum thread. 2008-12-20 12:04 UTC Only 24 hours remain until the Winter Solstice...the longest night/shortest day of the year. Although we are in the middle of winter in the northern hemisphere, the competition remains very hot...not to mention the heat coming off the cores. :) This is by far the most highly contested Challenge of the year. Most fitting for the finale in the 2008 Challenge series. For more information, please see this forum thread. 2008-12-18 18:50 UTC Over 24 hours into the 4 day (96 hour) Challenge and all is well. Everything is going quite smooth right now. Another record breaking amount of work is being completed. There are some close races in both the team and individual categories. It's not too late to join in and give your favorite team a boost. :) For more information, please see this forum thread. 2008-12-16 15:10 UTC Less than 24 hours remain till the Winter Solstice Challenge. Come join us in a 4 day (96 hour) Challenge on PrimeGrid's Prime Sierpinski Project (Sieve) application. Please consider running a few PSP (Sieve) WU's before the Challenge begins so your client will already have the sieve file. This way, during the Challenge, bandwidth can be used to deliver WU's instead of the sieve file. :) Thank you! For more information, please see this forum thread. 2008-12-10 03:50 UTC PrimeGrid's Challenge series for 2008 ends with the Winter Solstice Challenge. Please come join us in observing Nature's ending/beginning of a cycle. A 4 day (96 hour) Challenge is being offered on PrimeGrid's Prime Sierpinski Project (Sieve) application. For more information, please see this forum thread. 2008-012-07 04:20 UTC The database has finally started to recover from the Challenge...and we have finished licking our wounds. It was one heck of an initiation for the new server. The one positive outcome is that an incredible amount of work was completed (over 3.3M results in 48 hours). Again, the participation greatly exceeded our expectations. Congratulations to SETI.Germany as the top team and zeitgeistmovie.com as the top individual. One new prime was found by Fish. Thank you to all who participated and especially for your patience. We very much appreciate the support. For more stats and information, please see this forum thread. 2008-11-28 22:30 UTC Four and a half hours into the Prime Time Challenge (Reloaded) and all is well. After a few minor bumps at the start, everything seems to be going smoothly. Most definitely this is the highest activity PrimeGrid has ever seen. :) Finally a good initiation for the new server. Thank you to everyone participating. Now let's find some primes!!! For more information, please see this forum thread. 2008-11-27 19:00 UTC The pre-stress on the server to the Prime Time Challenge (Reloaded) has shown a substantial improvement. A few more adjustments should make things even better. Therefore, the Challenge is on for 28 Nov - 30 Nov. More information can be found in this forum thread. 2008-11-26 15:45 UTC The first new "reportable" primes have started to trickle in. Congratulations to Kai Strang for finding the first one 825*2^373331+1...just in time for the Prime Time Challenge (28 Nov - 30 Nov). Come join the Challenge and find a prime for yourself. For more information, please see this forum thread. 2008-11-24 17:20 UTC The Prime Time Challenge has been rescheduled for 28 Nov - 30 Nov. We would like to pre-stress the server on 27 Nov at 17:00 UTC. For more information, please see this forum thread. 2008-11-15 17:15 UTC While the Challenge has been canceled (will be rescheduled) we will continue keeping stats for the current dates (14-16 November). The reason for this is that we want to continue to stress the server so we can see the impact on different server related issues. This will help us better prepare for the Prime Time Challenge (Reloaded). :) For those who are interested, please continue to crunch Proth Prime Search LLR through 16 Nov 2008 18:00 UTC. The results will be unofficial but the process will help us greatly. Thanks for the consideration and again, we apologize for the cancellation. 2008-11-14 21:00 UTC The Prime Time Challenge has been canceled. While the server is fine, we are having issues that we are not yet able to resolve. We sincerely apologize for this. More information to come when we have it. 2008-11-13 18:00 UTC Less than 24 hours remain until the Prime Time Challenge (14-16 November 2008). The initiation process is already warming up as the load increases on the Proth Prime Search (LLR) in advance of the start. We are approaching the "reportable" level in Chris Caldwell's The Largest Known Primes Database! Come help us reach it and find a prime for yourself. For more information, please see this forum thread. 2008-11-09 04:30 UTC Less than a week remains until the 48hr Prime Time Challenge (14-16 November 2008). Come help us initiate the new server and maybe find a prime large enough to enter into Chris Caldwell's The Largest Known Primes Database! The Challenge will highlight PrimeGrid's newest project, the Proth Prime Search. For more information, please see this forum thread. 2008-11-01 03:30 UTC The key to an effective prime search is having a good sieve file. For the past several months, our primary focus has been on getting the PPS Sieve deep enough to start LLRing. While we have made great strides in this effort, we still need more help. Leading up to this Challenge, anyone with a 64 bit multiple core system is encouraged to join the Proth Prime Search sieving effort. Please see this post if you are interested. 2008-10-31 04:00 UTC PrimeGrid's Challenge series continues with the Prime Time Challenge (14-16 November 2008). It's high time we initiated the new server and what better way to do it than with a Challenge. Also, it's time to return to the thrill of finding primes...and for that, we turn to PrimeGrid's newest project, the Proth Prime Search. Currently, these tests are rather short so this will also give us a good opportunity to "stress" test and fine tune the new server. The Proth Prime Search is slowly working its way up to the "reportable" prime level in Chris Caldwell's The Largest Known Primes Database! So please come join us as we initiate the new server and bring the Proth Prime Search to the "reportable" prime level. For more information, please see this forum thread. 2008-10-27 20:30 UTC While I'm writing these lines, the database is already running on the shiny new server in the new rack. While Murhpy has definitely played his role today, we hope that all troubles are gone and everything will be running smooth from now on. The first minutes seem promising, and the speed has improved significantly. We'll keep you posted. Big thanks for Willy for his work on the servers, and to all donators who helped make this server a reality! 2008-10-23 18:10 UTC We are planning a scheduled downtime of several hours on Monday, October 27. We will be relocating PrimeGrid and BOINCstats servers to the new rack, and will add a new server for PrimeGrid, which has been purchased using funds from the recent donation drive. 2008-10-03 16:50 UTC In a review yesterday of the Cullen/Woodall Project status, it was determined that we are at "optimal" sieve depth...actually, a little beyond it. Therefore, we are stopping the 32 bit and 64 bit Cullen/Woodall Sieve applications and archiving the sieve. Cullen/Woodall LLR will remain active up to n=10M. For more information, please see this forum post. 2008-10-01 17:15 UTC We have just received a notice that the datacenter where PrimeGrid and BOINCstats are located are going to do planned maintenance on the electrical grid that is powering everything, so we will have an outage starting 23:00UTC. The outage is planned to last at least 3 hours. Sorry for the inconvenience; you may wish to cache a little more work this evening. 2008-09-30 15:05 UTC During the completion of the Challenge and in the excitement of reaching the funds for a new server, the Prime Sierpinski Problem Sieve entered into the 10P range. This was our "soft" goal for PrimeGrid's one year anniversary (13 October 2008). We reached it two weeks ahead of time. Congratulations everyone on this AMAZING accomplishment. For more information about the Prime Sierpinski Problem and next year's sieve goal, please see this forum post. 2008-09-29 03:00 UTC The Back to the Future Challenge has ended. Over 8000 Woodall WU's were completed by 204 teams and 1108 individuals. Congratulations to BOINCstats as the top team and lunarcom as the top individual. Also, thanks to the help of the anonymous donor as well as the hundreds of users who participated in the Challenge, we now have the funds to purchase a new server. For more stats and information, please see this forum post. 2008-09-27 05:15 UTC With just over half a day left in the Back to the Future Challenge, we have a solid green bar on the donation page. Congratulations everyone!!! The matching funds have come in as well as a message from the anonymous donor. A special thank you goes out to this individual for ensuring the continued growth of PrimeGrid. Best of Luck to everyone as this Challenge draws to an end. 2008-09-24 19:45 UTC Less than three days remain in the Back to the Future Challenge. There's still a battle for the top spot with BOINCstats holding off a fierce charge by the Canadians! :) Does either team have something up their sleeves for the last 72 hours? Only time will tell. Overall the Challenge is going well. We are almost to n=5.4M with a goal of 5.5M in sight. Additionally, donations are still being accepted for the new server. Currently, with the matching funds from the private donor, we have reached our goal. Any additional funds will go towards upgrading the server specs. A special thank you to everyone for helping out. Best of Luck in the next 72 hours. 2008-09-20 18:00 UTC Half way through and this is by far the most highly contested Challenge yet. Most surprisingly are the new teams and individuals atop the leader boards. A job well done by everyone. We are currently at the n=5.30M level with a goal of reaching 5.5M by the end. The Back to the Future Challenge has also made progress in donations for the new server. With seven days left, we have reached 52.8% of the funds needed. With the matching funds offer from the private donor, we need to reach at least 66.1%...the donor will complete the rest. One PrimeGrid user has started her own mini challenge, Krazy Kenzie's Server Challenge. She's just one donor away from success. :) Please check it out and see if you can help her make the "right" decision. 2008-09-16 16:30 UTC Congratulations to The Great Internet Mersenne Prime Search (GIMPS)! On August 23rd, a UCLA computer discovered the 45th known Mersenne prime, 2^43,112,609-1, a mammoth 12,978,189 digit number! The prime number qualifies for the Electronic Frontier Foundation $100,000 award for discovery of the first 10 million digit prime number. By the way, the second prime discovered less than two weeks later was also more than 10 million digits. It's the the 46th known Mersenne prime, 2^37,156,667-1, and comes in at 11,185,272 digits. For more information, please visit the GIMPS site. 2008-09-12 20:20 UTC Congratulations to The Great Internet Mersenne Prime Search (GIMPS)! They have made extraordinary finds within two weeks of each other after going almost two years without a prime. We certainly marvel at this wonderful achievement. They are currently working on finding a suitable press outlet. More details will be announced early next week. The big question...is either one 10 million digits or more to claim the Electronic Frontier Foundation $100,000 award? :) For more information, please visit the GIMPS site. Again, congratulations!!! 2008-09-12 19:40 UTC Less than 24 hours till the Back to the Future Challenge. Please come join us as we journey back to PrimeGrid's most successful project so far, the Woodall Prime Search, to help us prepare for the future. A private donor has made an anonymous "matching funds" offer matching all donations 1:1 made from now through the Challenge (13 Sept 18:00 UTC to 27 Sept 18:00 UTC) up to the total amount needed for the new server. For more information, please see this forum thread. 2008-09-06 00:00 UTC PrimeGrid's Challenge series continues with the Back to the Future Challenge. We are very pleased and excited to announce that a private donor has made an anonymous "matching funds" offer. All donations made from now until the end of this Challenge (27 September) will be matched 1:1 (up to the total amount needed for the new server). Please come join us as we journey back to PrimeGrid's most successful project so far, the Woodall Prime Search, to help us prepare for the future. For more information, please see this forum thread. 2008-08-31 06:00 UTC We are still awaiting contact with the pre-Challenge 321 Prime Search prime finder. If no contact is made soon, the prime will be transferred over to anonymous. PrimeGrid user, LadyHawk_A321, please contact project administrator at admin@primegrid.com as soon as possible. For more information on the prime, please see this forum thread. 2008-08-25 03:00 UTC Sirius has retreated to the horizon, but he refuses to go into the night sky without a prime. While the Challenge is over, the Dog Days remain...so let's put Sirius to sleep by finding that prime. It will take another 3-6 days for most results to be paired and declared valid. Therefore, Challenge rankings will not be finalized until then. The WU deadline was set to 3 days so unpaired results should be cleaned up quickly. For those who are interested in helping clean up these results, just leave your machines crunching 321 LLR for another 3 days. For up-to-date information, please see this forum thread. 2008-08-24 04:00 UTC Less than 24 hours remain. Sirius refuses to go back to the night. The only thing that is known to work is by feeding him a prime. So let's find that prime and bring the Dog Days of Summer to an end. :D For more information, please see this forum thread. 2008-08-22 17:55 UTC PrimeGrid server was inaccessible for about 30 minutes because the network at the datacenter where PrimeGrid and BOINCstats are hosted was down. The datacenter technicians seem to have brought the network back up, but we have no idea if it's going to stay up (the support phones of the hosting provider are down). Update 18:11 UTC: it seems that the power was cut to the building; the servers were forcibly rebooted. I'm checking for stuck system processes now. Update 18:15 UTC: validator was stuck; it's fixed now. I think everything is running smooth now. 2008-08-21 02:00 UTC Less than 24 hours till the Dog Days of Summer Challenge . For more information, please see this forum thread. 2008-08-16 02:00 UTC The cooling rains have started early. In the run-up to the Dog Days of Summer Challenge, PrimeGrid's first 321 Prime Search prime has been discovered. Stay tuned for more details. UPDATE: 2008-08-18 We are still awaiting contact with prime finder. 2008-08-15 01:00 UTC Look yonder in the hot summer sky and you can see the clouds building. A storm is brewing in the distance...a storm to end the Dog Days of Summer. Please come join us in a 3 day (22-24 August - 72 hour) Challenge to usher an end to the hot sweltering days of summer. PrimeGrid's 321 Prime Search LLR application has been chosen. For more information, please see this forum thread. 2008-08-08 01:40 UTC PrimeGrid's Challenge series continues with the Dog Days of Summer Challenge. Please come join us in ushering an end to the hot sweltering days of summer. A 3 day (22-24 August - 72 hour) Challenge is being offered on PrimeGrid's 321 Prime Search LLR application. For more information, please see this forum thread. 2008-07-31 16:00 UTC For those of you wondering what is the problem with Riesel Sieve, here is a word from BOINC side administrator Bryan: Basically, the project creator has disappeared. People have been in contact with him, but we haven't heard any resumption date or even if things will resume. For the time being, I'm focusing my efforts on getting the non-BOINC side of the project up, as it is far easier and requires far less resources. We do not have access to any of the databases or we would have been able to restore things even without the project creator. Our wishes for RS to return as soon as possible. 2008-07-27 20:00 UTC The Prime Sierpinski Project has discovered their second mega prime: 258317*2^5450519+1. It is 1640776 digits long and will rank as the 12th largest known prime. The project has now found 17 primes total. There are only 12 primes left to solve the Prime Sierpinski Problem. For more information, please see this forum post. 2008-07-22 6:20 UTC Database has been recovered, please read a lengthy explanation in this forum thread. 2008-07-21 21:00 UTC We are having database issues...stay tuned for more information. 2008-07-21 14:45 UTC "Houston, Tranquility Base here. The Eagle has landed." The Lunar Landing Challenge is over. Over 525,000 WU's were completed by 193 teams and 1331 individuals. Congratulations to SETI.Germany as the top team and Banshee as the top individual. For more stats and information, please see this forum post. 2008-07-19 00:00 UTC T-plus 24 hours after liftoff and all systems are nominal. :) The start severely stressed the vehicle, but it eventually made it into orbit. 48 hours remain until the Lunar Landing. For more information, please see this forum thread. 2008-07-17 14:00 UTC T-minus 10 hours till liftoff and all systems are go. A 3 day (18-20 July - 72 hour) Lunar Landing Challenge is being offered on PrimeGrid's Prime Sierpinski Project sieve application. For more information, please see this forum thread. 2008-07-15 00:00 UTC T-minus 3 days and counting. Unlike NASA, there are no holds in this countdown! :) Please come join us in commemorating the 39th Anniversary of the lunar landing by Apollo 11. A 3 day (18-20 July - 72 hour) Lunar Landing Challenge is being offered on PrimeGrid's Prime Sierpinski Project sieve application. For more information, please see this forum thread. 2008-07-14 06:00 UTC PrimeGrid is experiencing an increase in activity. In order to minimize the database AND to prepare for the upcoming Lunar Landing Challenge, sieve WU's have been lengthened. Credit has been adjusted accordingly. For more information, please see this post. 2008-07-10 5:25 UTC We are having database issues, stay tuned for more information. Update 5:38 UTC: the database has been brought back online. 2008-07-07 11:15 UTC [edit] Upgrade completed way ahead of schedule at 11:40 UTC. I am upgrading server software, so the project is offline. Estimated time of upgrade completion - 13:00 UTC. After the upgrade is completed, I will update this newspost. Post any issues you think may be caused by the upgrade to this thread. 2008-07-06 14:00 UTC PrimeGrid's Challenge series continues with the Lunar Landing Challenge. Please come join us in commemorating the 39th Anniversary of the lunar landing by Apollo 11. A 3 day (18-20 July - 72 hour) Challenge is being offered on PrimeGrid's Prime Sierpinski Project sieve application. For more information, please see this forum thread. 2008-06-29 19:20 UTC We've switched 3*2^n-1 subproject, which has been completed to n=5M and had no more work, to 3*2^n+1. The tasks are significantly shorter now (in the range of minutes), but it will change quite rapidly as we progress through the test space. 2008-06-13 03:00 UTC The Birthday Party is over and all the candles have been blown out. Over 200,000 WU's were completed by 84 teams and 374 individuals. Congratulations to L'Alliance Francophone as the top team and Banshee as the top individual. For more stats and information, please see this forum post page. 2008-06-11 03:30 UTC Less than a day remains until the Birthday Challenge begins. We are celebrating PrimeGrid's 3rd Birthday with a 24 hour Challenge on the Twin Prime Search. Please check your local time zones to determine your exact Challenge time: 12 June 2008 00:00 UTC to 13 June 2008 00:00 UTC. For more information, please see this forum thread. 2008-06-07 14:15 UTC PrimeGrid's Challenge series continues with the Birthday Challenge. Please come join us in celebrating PrimeGrid's 3rd Birthday. A 24 hour Challenge is being offered on PrimeGrid's oldest active application, the Twin Prime Search. Hopefully we'll be able to give PrimeGrid a good present by finding the twin during the Challenge. :) For more information, please see this forum thread. 2008-06-01 14:00 UTC The Checkered flag is out...and The Drive for Five Challenge has ended. 22512 WU's were completed by 255 teams and 1681 individuals. Congratulations to L'Alliance Francophone as the top team and Banshee as the top individual. Remember, the top 40 places earn points for this Challenge. For more stats and information, please see this forum post page. 2008-05-30 01:30 UTC Less than 48 hours remain in the Challenge. For teams, places 1-4 are pretty much wrapped up. However, there is a tight 3-way battle for 5th place and several others beyond that. For individuals, there are many tight races below the top 3. Remember, due to the length of the Challenge, places 1-40 will earn Challenge Points this time. For more information, please see the Challenge Series page. 2008-05-23 12:00 UTC Half way through the Challenge...and although an incredible amount of work has been accomplished, the numbers have the upper hand right now. 13020 WU's have been completed but 16036 remain. Our goal is still to reach n=5M. Therefore, we are hosting a sprint this weekend to see if we can get back even or maybe ahead of where we need to be in order to reach 5M by the end of 31 May. For more information, please see this forum post. 2008-05-16 00:30 UTC 24 hours into the Challenge and all is going well. 2100 WU's have been sent out and 26956 remain. Stats and more information can be found in this forum thread. 2008-05-14 00:00 UTC Only 24 hours remain until The Drive for Five Challenge begins. Please check your local time zones to determine the start of the challenge: 15 May 2008 00:00 UTC. For more information, please see this forum thread. 2008-05-11 14:10 UTC New application version for TPS subproject has been released. If it behaves correctly, I will release it for other subprojects. For the first time, it also features a screensaver! 2008-05-09 01:40 UTC PrimeGrid's Challenge series continues. Please come join our effort to reach n=5 million in the 321 Prime Search (3*2^n-1). The Challenge will begin 00:00 UTC, 15 May 2008. For more information, please see this forum thread. 2008-05-07 15:45 UTC We are aware of the issues saving your preferences (the message states that the changes have been saved, which doesn't actually happen), and are working to resolve the issue. It has been reported that logging out and in again helps, so you might try that as a workaround. UPDATE: as of 16:00 UTC preferences saving should work. 2008-04-30 13:55 UTC In an attempt to lower the size of the database, we have increased the WU length to both the PSP Sieve and GCW Sieve projects. WU's are now 1.5X as long...so a 6 minute WU now takes 9 minutes. Credit has been adjusted accordingly. 2008-04-26 17:00 UTC The deadlines for subprojects that have very long workunits have been increased to 12 days. The subprojects affected are Woodall Prime Search, Cullen Prime Search, 321 Prime Search and Prime Sierpinski Project (all LLR). 2008-04-23 20:00 UTC Nicolas has posted a standalone PrimeGrid screensaver application which is going to be included within the next science application update. We are looking for people to try it out on their computers so that we know it runs fine before we publish it project-wide. Visit the thread in the forums to find more about it. 2008-04-23 11:00 UTC  It is obvious that without computers we would find our life extremely difficult, maybe even impossible. If they disappeared for just one day, would we be able to cope? Be part of one of the biggest global experiments ever to take place on the Internet. The idea behind Shutdown Day is to find out how many people can go without a computer for one whole day, and what will happen if we all participate! Shutdown your computer on 03 May 2008 and find out! Visit shutdownday.org and join the campaign! (And before you ask - no, PrimeGrid server isn't going down on that day) 2008-04-18 15:05 UTC On 23 Mar 2008 7:57:28 UTC, PrimeGrid, in collaboration with 321 Search, found another Mega Prime: 3*24235414-1 The prime is 1,274,988 digits long and enters The Largest Known Primes Database ranked 14th overall. This is 321 Searches's first mega prime and 11th prime overall. It is the second largest found mega-digit prime using LLR. The discovery was made by Dylan Bennett of Canada using an Intel C2D @ 1.66 GHz with 2GB RAM. This computer took almost 15 hours and 30 minutes to complete the primality test. For more details, please see the official announcement. Decimal representation of the number is also available. 2008-04-17 01:40 UTC A PrimeGrid participant has discovered a Mega Prime for the 321 Search project. Stay tuned for more details. 2008-04-14 18:30 UTC We have released an updated prime finder statistics page, which now counts primes find in all subprojects. The prime numbers are assigned a score which differs according to prime number size, so a giant Woodall prime is "worth" more than a smaller TPS prime. The next step in improving statistics is to show the participants all the primes that have been found, which isn't yet available in the current version, but is coming soon. 2008-04-14 14:00 UTC After two months of testing, the Project Staging Area is officially open. This area was established to help prepare future projects for entry into PrimeGrid BOINC. It also offers a sneak peak into these projects by allowing users a chance to crunch them ahead of time. For more information, please see this forum thread. 2008-04-10 17:40 UTC The Prime Sierpinski Project has discovered their first mega prime: 265711*2^4858008+1 (1462412 digits long). The project has now found 16 primes total. There are only 13 primes left to solve the Prime Sierpinski Problem. For more information, please see this forum thread. 2008-03-26 19:00 UTC We are back up and running. For a detailed explanation of the events that caused the outage, please see the forum thread. 2008-03-22 18:15 UTC The aftermath of the Ides of March Challenge has taken its toll as the database has been experiencing issues since 20 March 2008. Conditions are slowly starting to improve. For more information, please see this forum thread. 2008-03-16 04:00 UTC Congratulations everyone on a job well done. The participation was well beyond our expectations. We exceeded our initial goal of 50K WU's and our advanced goal of 250K WU's downloaded. Additionally, we completed well beyond the sieve depth of p=2500T so a GREAT milestone for the Prime Sierpinski project and Seventeen or Bust. For more details on results, please see this forum post. 2008-03-15 12:00 UTC First 12 hours of the challenge have gone well! 186.1K WU's have been downloaded so far. Our original goal was 50K and that was hit 1 hour 35 minutes into the Challenge. Quite AMAZING!!! For an updated status, please see this forum post. 2008-03-14 14:00 UTC Less than 10 hours until the Ides of March. There has been an unprecedented run-up before the Challenge. We can sense the impending doom for 1000's of k/n pairs. For updated information, please see the forum thread. 2008-03-12 15:00 UTC Only 3 days remain until the Ides of March. Please check you local time zones to determine the start of the challenge: 15 March 2008 00:00 UTC. For updated information, please see the forum thread. 2008-03-08 14:15 UTC With the Ides of March just a week away, we wish to offer a challenge. Come join a one day effort in an attempt to push the Prime Sierpinski Sieve to over 50,000 WU's in one day and thus reach the p=2500T sieve depth. For more information, please see the forum thread. 2008-03-02 15:00 UTC A 64bit Linux sr2sieve application has been released for the Prime Sierpinski Problem sieve. For more information, please see the forum post. 2008-02-27 5:30 UTC PrimeGrid will soon be offering three new projects. For more information about these and future considerations, please see the forum thread. 2008-02-20 18:30 UTC Version 1.04 of PSP Sieve application has been released, fixing the issue with 64bit Windows hosts. 2008-02-19 13:15 UTC We have temporarily disabled 64bit Windows PSP Sieve application because it was crashing and locking up BOINC client. We are investigating the cause for that; for now 32bit application will be sent instead. 2008-02-18 10:15 UTC I know some of you were eagerly awaiting this. Well, the time has come - we now started testing 64bit Linux gcwsieve application. For more information, see the forum thread. 2008-02-15 15:23 UTC We are inserting the final batches of work for our oldest available application, primegen. While primegen has proved to be very useful in the early project stages for infrastructure testing, it has served it's purpose and it's time to make way for newer, more efficient applications. Once the final batches are completed the cleanup will be executed, finally removing old stuck workunits. We suggest participants running primegen exclusively also select an additional subproject for future processing. Sieve subprojects are very similar to primegen in size, so it is probably a good choice. Once there are no more primegen work to send, we will update project for such participants to select sieve subprojects. 2008-01-31 14:15 UTC PrimeGrid is down for a moment, because workunit table has crashed; the repair process is running right now. Thanks to Lennart from Sweden who called me on the phone and told about the problem. Update 14:22 UTC: We're back up. 2008-01-10 8:15 UTC Twin prime search work is available again (we had a few days outage for this subproject because work supply went dry). 2007-12-29 21:05 UTC On 21 Dec 2007, 10:09:30 UTC, PrimeGrid's Woodall Prime Search found the 33rd and largest known to date Woodall prime: 3752948*23752948-1 The prime is 1,129,757 digits long and enters The Largest Known Primes Database ranked 1st for Woodall primes and 13th overall. It's the first found mega-digit prime using LLR. The discovery was made by Matthew J. Thompson of the United States using an Intel P4 @ 2.8 GHz with 512MB RAM. This computer took almost 15 hours and 11 minutes to complete the primality test. 2007-12-28 20:30 UTC A user of PrimeGrid has discovered a Woodall prime which is over 1 million digits long. It is the biggest Woodall prime ever discovered, and 13th biggest known prime of any kind. Stay tuned for more details. 2007-12-16 15:30 UTC Server backend code has been upgraded, the option to decline team founder transfer now works. If you notice any errors (no, dozens of buttons in the forum is not an error), please post in the forums or use the contact link available in every page in the very bottom. 2007-12-09 16:00 UTC During the night of December 14/15 (Europe time) PrimeGrid server will be down because of scheduled maintenance in the datacenter where PrimeGrid and BOINCstats are hosted. The downtime is needed to upgrade power infrastructure, because currently there isn't enough backup power (UPS) to run all the servers in case of a power outage. 2007-12-05 17:45 UTC We have released the LLR application for the 321 Search. 321 is attempting to find a mega prime in the form 3*2^n-1. The 4+ year old project currently holds the largest non-GIMPS/non-Seventeen or Bust prime. As usual, you can choose to crunch work for this project by visiting your project preferences page. Supported platforms: 32bit Linux & Windows. 2007-12-05 8:13 UTC Results table has crashed, the project is offline while we recover data. Update: the issue has been resolved at 8:57 UTC. 2007-10-30 9:45 UTC From now on you can give permission to PrimeGrid to report the primes you find to the Prime Pages on your behalf. To do this, go to the project preferences page and enter your data. 2007-10-27 20:00 UTC The backend code has been upgraded. There were some issues related to the web code, but they seem to be fixed. If you find any problems that I missed, please post in the forums. 2007-10-14 12:15 UTC Good news for Linux lovers - with the help from our user Der Meister we have released 32bit Linux LLR application for Twin Prime Search project. If it goes well, it will be released for Cullen/Woodall Prime Search, too. The 32bit application is also being sent to 64bit hosts. 2007-10-13 14:15 UTC We have released Sieve application for Prime Sierpinski Project. It is trying to solve the Prime Sierpinski Problem. Windows 32bit and 64bit versions are supported. As usual, you can choose to crunch work for this project by visiting your project preferences page. 2007-09-30 16:15 UTC Thanks to Bryan from Riesel Sieve, the Cullen workunit progress reporting bug has been fixed. The workunits running application version 5.08 should correctly display feedback during processing. 2007-09-29 15:30 UTC A 64bit Windows version of GCW sieve application has been released. It improves speed twice comparing to 32bit version. The new application is automatically sent to hosts running 64bit version of BOINC that have sieving subproject enabled in the project preferences. 2007-09-15 18:35 UTC We have released a sieving app for Cullen/Woodall Prime Search. Sieving will help to greatly reduce the amount of probable primes, therefore speeding up the actual prime search. You can choose to run sieve application by visiting project preferences page; please have in mind that the application has just been released, so it may have bugs or issues (although we haven't noticed any). Supported platforms: Windows 2000/XP/2003/Vista. 2007-09-03 15:00 UTC On 20 Aug 2007, 2:40:57 UTC, PrimeGrid's servers returned a positive result in the Woodall Prime Search. It was the double check validating that a Woodall prime was found on 13 Aug 2007, 1:42:08 UTC. 2367906*22367906-1This is the 32nd and largest known to date Woodall prime. It is 712818 digits long and enters The Largest Known Primes Database (http://primes.utm.edu/primes/) ranked 1st for Woodall primes and 25th overall.The discovery was made by Stephen Kohlman of Canada using an Intel C2D 6300 @ 1.86 GHz with 1 GB RAM. This computer took a little over 5 hours and 41 minutes to test using the LLR program. Stephen is a member of Canada team. 2007-09-03 7:25 UTC I will be leaving to Geneva for BOINC Workshop early tomorrow morning. This means that the project will have to run unattended for almost a week (I will of course monitor the server, but my time will be limited, so don't expect quick fixes if something dies). 2007-08-25 15:15 UTC Message to project participant known as "Owner" or "big steve": please contact project administrator at admin@primegrid.com. Your computer has made a significant discovery, and we want to know your details before we publicize it. 2007-08-19 16:30 UTC Tonight at 0:00UTC network maintenance will be performed in the datacenter where PrimeGrid server is hosted. The maintenance is planned to last approximately 30 minutes, during it the access to the project might be slow or unavailable. Sorry for the inconvenience. 2007-08-09 18:00 UTC On 7 Aug 2007, 15:25:07 UTC, PrimeGrid's servers returned a positive result in the Woodall Prime Search. It was the double check validating that a Woodall prime was found on 4 Aug 2007, 19:36:57 UTC. 2013992*22013992-1The prime is 606279 digits long and enters The Largest Known Primes Database (http://primes.utm.edu/primes/) ranked 1st for Woodall primes and 37th overall.The discovery was made by Lasse Mejling Andersen of Denmark using an Intel Celeron 2.80 GHz with 512 MB RAM. This machine took a little over 3 hours and 27 minutes to test using the LLR program. For more details, please see here. 2007-08-08 5:56 UTC A few minutes ago PrimeGrid validated a workunit that had discovered the biggest Woodall prime ever discovered. More information will follow up later. 2007-08-06 12:20 UTC Validation of returned results may be slow or even temporarily suspended while we sort the problems that appeared because of software upgrade. All credit will be granted, no work is lost. 2007-08-04 19:30 UTC Stats sites should update references to PrimeGrid stats - filenames have changed because of recent code update. 2007-08-03 21:30 UTC The maintenance has been extended because of issues getting new work. 2007-08-02 14:59:05 UTC PrimeGrid will be shut down for major software upgrade on August 3rd, 15:00UTC. The outage will last at least 4 hours, but may well be extended up to 48 hours. 2007-07-03 17:16:20 UTC We have added a new prime search project, Cullen/Woodall prime search. These primes are of forms n*2n+1 and n*2n-1 respectively. Our goal is to find the biggest Cullen and Woodall primes ever. This isn't as easy as it may sound, only 14 Cullen primes and 30 Woodall primes have ever been found, however, we believe that PrimeGrid has sufficient computing power to make this search plausible. It is now possible to choose the subprojects you would like to run in project preferences page. Please note that when you are using account managers your choice may be reset when changing resource share allocation. 2007-06-15 14:02:48 UTC Our user Terminal has been collecting statistics about our progress in the current Twin Prime Search project. Please see this thread for more information. 2007-06-06 17:39:59 UTC Today marks the day when 10 millionth workunit was issued in the project. While this is nothing more than a simple numeric milestone, it is a really nice number to reach in the project that is all about numbers. The workunit was crunched by the computer owned by user Strelnieks. Congratulations! |
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