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Leonids Challenge
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[DPC]CharleyVolunteer moderator
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Welcome to the Leonids Challenge
With the amount of power we've been seeing lately we're hoping to mirror the meteor shower known as the Leonids and take down a lot composite candidates and maybe even find a prime.
A 5 day Challenge is being offered on PrimeGrid's 321 Prime Search (LLR) application. To participate in the Challenge, please select only the 321 Prime Search (LLR) project in your PrimeGrid preferences section. The challenge will begin 14 November 2013 18:00 UTC and end 19 November 2013 18:00 UTC. Application builds are available for Linux, MacIntel, and Windows 32 and 64 bit.
NOTE: In your PrimeGrid preferences section, set "Send work from any subproject if selected projects have no work" to no to guarantee that no other work will be sent.
ATTENTION: The primality program LLR is CPU intensive; so, it is vital to have a stable system with good cooling. It does not tolerate "even the slightest of errors." Please see this post for more details on how you can "stress test" your computer. WU's will take 8-12 hours on fast/newer computers and 25+ hours on slower/older computers. If your computer is highly overclocked, please consider "stress testing" it. Sieving is an excellent alternative for computers that are not able to LLR. :)
Restricted airflow is one of the primary reasons for overheating. Take the time to monitor the fans and review the dust buildup. Please, please, please make sure your machines are up to the task.
Time zone converter:
The World Clock - Time Zone Converter
NOTE: The countdown clock on the front page uses the host computer time. Therefore, if your computer time is off, so will the countdown clock. For precise timing, use the UTC Time in the data section to the left of the countdown clock.
Scoring Information
Scores will be kept for individuals and teams. Only work units issued AFTER 14 November 2013 18:00 UTC and received BEFORE 19 November 2013 18:00 UTC will be considered for credit. We will use a modified version of our credit algorithm which is based on the n value (k*b^n-1) and adjusted for the type of number and FFT size to score the challenge. The main difference is that the primary and double checker of a WU will receive the same score.
Therefore, each completed WU will earn a unique score based on its n value. The higher the n, the higher the score. This is different than BOINC cobblestones! A quorum of 2 is NOT needed to award Challenge score - i.e. no double checker. Therefore, each returned result will earn a Challenge score. Please note that if the result is eventually declared invalid, the score will be removed.
At the Conclusion of the Challenge
We would prefer users "moving on" to finish those tasks they have downloaded, if not then please ABORT the WU's instead of DETACHING, RESETTING, or PAUSING.
ABORTING WU's allows them to be recycled immediately; thus a much faster "clean up" to the end of an LLR Challenge. DETACHING, RESETTING, and PAUSING WU's causes them to remain in limbo until they EXPIRE. Therefore, we must wait until WU's expire to send them out to be completed.
Please consider either completing what's in the queue or ABORTING them. Thank you. :)
About 321 Prime Search
321 Prime Search is a continuation of Paul Underwood's 321 Search (see below) which looked for primes of the form 3*2^n-1. PrimeGrid added the +1 form and continues the search up to n=25M.
Primes known for 3*2^n+1 occur at the following n (PrimeGrid's finds in bold & linked):
1, 2, 5, 6, 8, 12, 18, 30, 36, 41, 66, 189, 201, 209, 276, 353, 408, 438, 534, 2208, 2816, 3168, 3189, 3912, 20909, 34350, 42294, 42665, 44685, 48150, 54792, 55182, 59973, 80190, 157169, 213321, 303093, 362765, 382449, 709968, 801978, 916773, 1832496, 2145353, 2291610, 2478785, 5082306, 7033641
Primes known for 3*2^n-1 occur at the following n (PrimeGrid's finds in bold & linked):
1, 2, 3, 4, 6, 7, 11, 18, 34, 38, 43, 55, 64, 76, 94, 103, 143, 206, 216, 306, 324, 391, 458, 470, 827, 1274, 3276, 4204, 5134, 7559, 12676, 14898, 18123, 18819, 25690, 26459, 41628, 51387, 71783, 80330, 85687, 88171, 97063, 123630, 155930, 164987, 234760, 414840, 584995, 702038, 727699, 992700, 1201046, 1232255, 2312734, 3136255, 4235414, 6090515
What is LLR?
The Lucas-Lehmer-Riesel (LLR) test is a primality test for numbers of the form N = k*2^n - 1, with 2^n > k. Also, LLR is a program developed by Jean Penne that can run the LLR-tests. It includes the Proth test to perform +1 tests and PRP to test non base 2 numbers. See also:
(Edouard Lucas: 1842-1891, Derrick H. Lehmer: 1905-1991, Hans Riesel: born 1929).
About 321 Search
321 Search began in February 2003 from a post by Paul Underwood seeking help from interested parties in a prime search attempt of the form 3*2^n-1. The initial goal was to build upon the completed work at Proth Search and extend the list of known primes to an exponent of 1 million (n=1M). That was quickly achieved so they advanced their goal to finding a mega prime for which they sieved up to n=5M.
As seen on PrimeGrid's front page, that goal was achieved on 23 Mar 2008, 7:57:28 UTC, when Dylan Bennett of Canada returned a positive result for n=4235414 (3*2^4235414-1). official announcement | decimal representation
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PrimeGrid Challenge Overall standings --- Last update: From Pi to Paddy (2016)
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I'll be there, despite being a little miffed there is no 64 bit client for Linux -- I will have to run the 32 bit client on my 64 bit Linux box.
A prime must come soon. So the challenge might be just what is needed... | |
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I'll be there, despite being a little miffed there is no 64 bit client for Linux -- I will have to run the 32 bit client on my 64 bit Linux box.
A prime must come soon. So the challenge might be just what is needed...
I believe the original post needs updating. The standard LLR app for Linux (primegrid_sllr_3.8.9_x86_64-pc-linux-gnu) is 64-bit. So crunch on happily. There is a 32-bit app available for those with older hardware. Either way, let's hope we find a 321 prime!
--Gary | |
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 Michael Goetz Volunteer moderator
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I'll be there, despite being a little miffed there is no 64 bit client for Linux -- I will have to run the 32 bit client on my 64 bit Linux box.
A prime must come soon. So the challenge might be just what is needed...
I believe the original post needs updating. The standard LLR app for Linux (primegrid_sllr_3.8.9_x86_64-pc-linux-gnu) is 64-bit. So crunch on happily. There is a 32-bit app available for those with older hardware. Either way, let's hope we find a 321 prime!
--Gary
Indeed, 64 bit LLR is available on all platforms. The post has been updated accordingly.
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My lucky number is 75898524288+1 | |
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In looking at the work of my various 68 (give or take) CPU cores that are online at any given time, they seem less than stellar @ 321 than on other projects (not exactly spring chickens).
If that's true, is it better to pick up the WUs left behind of the Super Procs, or (to the project) does that not matter, and you're looking for 'the-more-cores-the-better'?
I do not overclock, and heat is not an issue, so I'm good either way.
Thanks,
Andrew | |
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In looking at the work of my various 68 (give or take) CPU cores that are online at any given time, they seem less than stellar @ 321 than on other projects (not exactly spring chickens).
If that's true, is it better to pick up the WUs left behind of the Super Procs, or (to the project) does that not matter, and you're looking for 'the-more-cores-the-better'?
I do not overclock, and heat is not an issue, so I'm good either way.
Thanks,
Andrew
If you are using hyperthreading, LLR does not play very well with it. You may try to disable or run at half. Of course it depends on the type of processor. It seems pre i7 architecture works best with hyperthread hard off in BIOS. i7 seems to work best with leaving hyperthread on but use half (IMHO). Although it seems the 3rd and 4th Gen may be able to handle a little more. I am finding 75% seems to be pretty good, but then it depends on the size of the units. SOB I would run at 50%. SR5 is running fine at 75%. I guess I should test out a few 321 before the challenge myself to see what fits.
Good luck with however you decide.
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My lucky numbers are 121*2^4553899-1 and 3756801695685*2^666669±1 | |
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chip
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321 LLR (560K/576K FFT) on i7-2600K @ 4500MHz with DDR3 @ 2133MHz, scale factor:
1-core = 1.00x
2-core = 1.95x
3-core = 2.70x
4-core = 3.20x | |
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Michael GoetzVolunteer moderator
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321 LLR (560K/576K FFT) on i7-2600K @ 4500MHz with DDR3 @ 2133MHz, scale factor:
1-core = 1.00x
2-core = 1.95x
3-core = 2.70x
4-core = 3.20x
The benchmark difference between the -1 form (560K FFT) and the +1 form (576K) is, by itself, about 5%, which is a quarter of the 20% difference in speed you're seeing between 1 core and 4 cores. It might be worthwhile when running that test to ensure you're using the same number, or at least the same C and FFT size, for all cores.
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Please do not PM me with support questions. Ask on the forums instead. Thank you!
My lucky number is 75898524288+1 | |
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321 LLR (560K/576K FFT) on i7-2600K @ 4500MHz with DDR3 @ 2133MHz, scale factor:
1-core = 1.00x
2-core = 1.95x
3-core = 2.70x
4-core = 3.20x
HT enabled or disabled in the BIOS?
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chip
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HT enabled in BIOS, in OS for primegrid_cllr.exe set affinity to odd cores. | |
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HT enabled in BIOS, in OS for primegrid_cllr.exe set affinity to odd cores.
I have my 2600K set the same except my affinity is on even cores. I use ProLasso. What are you using?
NM*
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Largest Primes to Date:
As Double Checker: SR5 109208*5^1816285+1 Dgts-1,269,534
As Initial Finder: SR5 243944*5^1258576-1 Dgts-879,713
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I set affinity manually for parent process 'boinc.exe'. | |
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[DPC]CharleyVolunteer moderator
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Time to pre-heat the grill for some rat-kebabs. I'm gunning for at least a couple of you Pews! ;)
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PrimeGrid Challenge Overall standings --- Last update: From Pi to Paddy (2016)
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Stats screenshot before challenge...
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wbr, Me. Dead J. Dona
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Just a curious question, I have 55 minutes in and it's 8% done. What are the times everyone else are seeing? I run another project that is fully loading the iGPU (which actually disables turbo boost on the CPU). Just trying to get a baseline! | |
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4 cores of i5-3570 @4.1GHz & 1600MHz DDR3
1:10:00.
3*2^10416548±1. FFT Length: 576K = 7.929%
3*2^10416700±1. FFT Length: 560K = 9.475%
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Michael GoetzVolunteer moderator
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Just a curious question, I have 55 minutes in and it's 8% done. What are the times everyone else are seeing? I run another project that is fully loading the iGPU (which actually disables turbo boost on the CPU). Just trying to get a baseline!
If you go to the PrimeGrid preferences page where you select the projects to run, you'll see this in the 321 selection row:
Recent average CPU time: 30:36:34
That's a mix of all CPUs, many of which (most likely a large majority) are not AVX.
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Please do not PM me with support questions. Ask on the forums instead. Thank you!
My lucky number is 75898524288+1 | |
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I did see those, thanks for the help. I wanted to get some more powerful CPU's in my range to directly compare to. | |
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There are a lot of causes a power depends on: AVX support, HT onn/off, a count of parallel AVX tasks, DRAM frequence, FFT Length, and the last in this row - CPU frequence.
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There are a lot of causes a power depends on: AVX support, HT onn/off, a count of parallel AVX tasks, DRAM frequence, FFT Length, and the last in this row - CPU frequence.
AVX is enabled for anthing that supports it, DRAM is 1866, FFT Length I am not aware of, and my CPU is at 3.5GHz and using ~35 watts. 2 hours in and i'm at 17% | |
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4 cores i7-2600k @ 4.4 HT off 1600 RAM = ~13hrs. | |
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4 cores i7-2600k @ 4.4 HT off 1600 RAM = ~13hrs.
so according to your time to completion, our speeds are somewhat similar. That's good to know. | |
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Time to pre-heat the grill for some rat-kebabs. I'm gunning for at least a couple of you Pews! ;)
I wasn't going to participate... But you've forced my hand
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275*2^3585539+1 is prime!!! (1079358 digits)
 Proud member of Aggie the Pew
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Time to pre-heat the grill for some rat-kebabs. I'm gunning for at least a couple of you Pews! ;)
Unbelievable.. a cow finally speaks and here I figured the herd had migrated.
Are you sure you know how to pre-heat the grill? I'm sure someone can find you some readable instructions with pictures and all :)
Cheers, a rat who might be passed but never gunned down.
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@AggieThePew
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I've got this thing that makes the noise of a cow when you turn it upside down.
It's a cow.
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Oh Bondage? Up Yours.
http://www.youtube.com/watch?v=ogypBUCb7DA
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4 cores i7-2600k @ 4.4 HT off 1600 RAM = ~13hrs.
Finished in 11.5 hours 560fft | |
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As neither the mega-rat or the mega-cow have turned in any units so far the horde and the herd are neck and neck... I've had to resort to the dust mask again.
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@AggieThePew
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Michael GoetzVolunteer moderator
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At approximately 25 hours into the challenge:
tasks sent to host computers: 19472 (normal is about 500 per day)
tasks successfully returned: 1335 (almost certainly all on AVX CPUs)
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My lucky number is 75898524288+1 | |
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tasks successfully returned: 1335 (almost certainly all on AVX CPUs)
My pre-AVX i7-980X @ 4GHz returned its first task at 12:06:15 UTC and five more WUs at 14:21:19. So it's definitely not AVX-only any more. :)
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Yes come on you slowcoaches get on with it -mine are still in pending :D
A 321 coming out of pending can be something to look forward to in a Sat, that's how little I have going on this weekend ;). | |
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After 2 days:
Number of tasks sent: 26857
Number of tasks returned successfully: 5486
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My lucky number is 75898524288+1 | |
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Let's sort this 1 out: http://www.primegrid.com/workunit.php?wuid=367734428 | |
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Michael GoetzVolunteer moderator
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The day 3 report (a few hours early):
Challenge tasks sent: 33354
Valid challenge tasks received: 11697
No primes to report yet.
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My lucky number is 75898524288+1 | |
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[DPC]CharleyVolunteer moderator
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Too bad no primes have been found yet. Would be nice to find one again after, what... three years almost?
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PrimeGrid Challenge Overall standings --- Last update: From Pi to Paddy (2016)
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DaveSend message
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Let's sort this 1 out: http://www.primegrid.com/workunit.php?wuid=367734428
Sorted: http://www.primegrid.com/workunit.php?wuid=367734428 | |
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Yeah:
http://primes.utm.edu/primes/page.php?id=98959
http://primes.utm.edu/primes/page.php?id=92517
To date there has never been a prime for the minus form whose exponent is over twice as big as the last one. The average increase is about 1.34. We should be on the brink of a new one. Why not stick around after the challenge finishes? | |
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[DPC]CharleyVolunteer moderator
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With 9-odd hours left, it's time to get those last units out and prepare for the end/clean up.
At the Conclusion of the Challenge
We would prefer users "moving on" to finish those tasks they have downloaded, if not then please ABORT the WU's instead of DETACHING, RESETTING, or PAUSING.
ABORTING WU's allows them to be recycled immediately; thus a much faster "clean up" to the end of an LLR Challenge. DETACHING, RESETTING, and PAUSING WU's causes them to remain in limbo until they EXPIRE. Therefore, we must wait until WU's expire to send them out to be completed.
Please consider either COMPLETING what's in the queue or ABORTING them. Thank you. :)
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PrimeGrid Challenge Overall standings --- Last update: From Pi to Paddy (2016)
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Just wondering if you kept any records on the number of participants per challenge. I'm very pleasantly surprised at the number we have in this challenge.
Cheers Rick
ps - those pesky cows seem to grow out of the wood work or ponds.
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@AggieThePew
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Congrats to the Czech National Team. Nicely done. Hasta la vista, baby.
Thanks also to those who took part, especially the vermin, but more especially to those who made it possible.
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Oh Bondage? Up Yours.
http://www.youtube.com/watch?v=ogypBUCb7DA
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so guys how did the whole challenge go this time...as expected,beat expectations? | |
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Michael GoetzVolunteer moderator
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Cleanup Status:
19-Nov: 5767 tasks outstanding; 4435 in individual (199) scoring positions; 3910 in team (91) scoring positions.
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Please do not PM me with support questions. Ask on the forums instead. Thank you!
My lucky number is 75898524288+1 | |
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Michael GoetzVolunteer moderator
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so guys how did the whole challenge go this time...as expected,beat expectations?
Tasks sent out during the challenge: 46999
Tasks returned during the challenge: 25840
Normally, we do about 500 per day, so we did more than 10 times what we normally do.
That number is underestimated, however, because it doesn't include tasks sent before the challenge but returned during the challenge, or tasks sent during the challenge but returned after the challenge, since neither would count as a challenge task.
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Ones downloaded before end but returned after end I guess can count as clean-up. I have all quorum _2+ in cache now. | |
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Ones downloaded before end but returned after end I guess can count as clean-up. I have all quorum _2+ in cache now.
Yes, assuming that you are the wingman for someone who received & completed & returned those tasks during the challenge. | |
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How much did we advance the leading edge by during the challenge?
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Just wondering if you kept any records on the number of participants per challenge. I'm very pleasantly surprised at the number we have in this challenge.
Cheers Rick
ps - those pesky cows seem to grow out of the wood work or ponds.
For the past year and something:
Year M. Project Name Participants
2012 1 PPS LLR Year of the Dragon 3242
2012 4 SGS LLR Marie-Sophie Germain 2090
2012 5 TRP LLR Cinco de Mayo 1269
2012 6 GFN Alan Turing Year 430
2012 8 TRP Sieve Olympics 850
2012 10 PPS LLR An Apple a Day 1200
2012 11 321 LLR 321 Blast Off 1651
2012 12 PPS Sieve Winter Solstice 1963
2013 1 GFN Short Year of the Snake 810
2013 2 SGS Valentine's Day 1030
2013 3 PPS LLR Equinox 2542
2013 4 WOO LLR Low countries fest. 826
2013 6 SR5 LLR Father's day 944
2013 8 TRP Sieve Perseid shower 1114
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PrimeGrid Challenge Overall standings --- Last update: From Pi to Paddy (2016)
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Michael GoetzVolunteer moderator
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Cleanup Status:
19-Nov: 5767 tasks outstanding; 4435 in individual (199) scoring positions; 3910 in team (91) scoring positions.
20-nov: 4536 tasks outstanding; 3416 in individual (198) scoring positions; 2672 in team (84) scoring positions.
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Please do not PM me with support questions. Ask on the forums instead. Thank you!
My lucky number is 75898524288+1 | |
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Year M. Project Name Participants
2012 1 PPS LLR Year of the Dragon 3242
2012 4 SGS LLR Marie-Sophie Germain 2090
2012 5 TRP LLR Cinco de Mayo 1269
2012 6 GFN Alan Turing Year 430
2012 8 TRP Sieve Olympics 850
2012 10 PPS LLR An Apple a Day 1200
2012 11 321 LLR 321 Blast Off 1651
2012 12 PPS Sieve Winter Solstice 1963
2013 1 GFN Short Year of the Snake 810
2013 2 SGS Valentine's Day 1030
2013 3 PPS LLR Equinox 2542
2013 4 WOO LLR Low countries fest. 826
2013 6 SR5 LLR Father's day 944
2013 8 TRP Sieve Perseid shower 1114
Thanks D, there's been lots of folks running these challenges | |
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Cleanup Status:
19-Nov: 5767 tasks outstanding; 4435 in individual (199) scoring positions; 3910 in team (91) scoring positions.
20-Nov: 4536 tasks outstanding; 3416 in individual (198) scoring positions; 2672 in team (84) scoring positions.
21-Nov: 3386 tasks outstanding; 2268 in individual (194) scoring positions; 1587 in team (71) scoring positions.
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Please do not PM me with support questions. Ask on the forums instead. Thank you!
My lucky number is 75898524288+1 | |
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Stats screenshot before challenge...
and after
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wbr, Me. Dead J. Dona
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Michael GoetzVolunteer moderator
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Cleanup Status:
19-Nov: 5767 tasks outstanding; 4435 in individual (199) scoring positions; 3910 in team (91) scoring positions.
20-Nov: 4536 tasks outstanding; 3416 in individual (198) scoring positions; 2672 in team (84) scoring positions.
21-Nov: 3386 tasks outstanding; 2268 in individual (194) scoring positions; 1587 in team (71) scoring positions.
22-Nov: 2310 tasks outstanding; 1418 in individual (186) scoring positions; 1006 in team (52) scoring positions.
23-Nov: 1668 tasks outstanding; 1009 in individual (181) scoring positions; 681 in team (46) scoring positions.
24-Nov: 1102 tasks outstanding; 609 in individual (158) scoring positions; 175 in team (26) scoring positions.
25-Nov: 786 tasks outstanding; 402 in individual (141) scoring positions; 118 in team (18) scoring positions.
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Please do not PM me with support questions. Ask on the forums instead. Thank you!
My lucky number is 75898524288+1 | |
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Michael GoetzVolunteer moderator
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Joined: 21 Jan 10
Posts: 12387
ID: 53948
Credit: 178,060,290
RAC: 121,484
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Cleanup Status:
19-Nov: 5767 tasks outstanding; 4435 in individual (199) scoring positions; 3910 in team (91) scoring positions.
20-Nov: 4536 tasks outstanding; 3416 in individual (198) scoring positions; 2672 in team (84) scoring positions.
21-Nov: 3386 tasks outstanding; 2268 in individual (194) scoring positions; 1587 in team (71) scoring positions.
22-Nov: 2310 tasks outstanding; 1418 in individual (186) scoring positions; 1006 in team (52) scoring positions.
23-Nov: 1668 tasks outstanding; 1009 in individual (181) scoring positions; 681 in team (46) scoring positions.
24-Nov: 1102 tasks outstanding; 609 in individual (158) scoring positions; 175 in team (26) scoring positions.
25-Nov: 786 tasks outstanding; 402 in individual (141) scoring positions; 118 in team (18) scoring positions.
26-Nov: 547 tasks outstanding; 267 in individual (115) scoring positions; 25 in team (13) scoring positions.
27-Nov: 376 tasks outstanding; 174 in individual (92) scoring positions; 17 in team (12) scoring positions.
28-Nov: 261 tasks outstanding; 107 in individual (69) scoring positions; 8 in team (6) scoring positions.
29-Nov: 154 tasks outstanding; 63 in individual (45) scoring positions; 4 in team (4) scoring positions.
30-Nov: 126 tasks outstanding; 48 in individual (37) scoring positions; 3 in team (3) scoring positions.
1-Dec: 87 tasks outstanding; 33 in individual (26) scoring positions; 2 in team (2) scoring positions.
2-Dec: 57 tasks outstanding; 22 in individual (16) scoring positions; 1 in team (1) scoring positions.
3-Dec: 39 tasks outstanding; 13 in individual (11) scoring positions; 1 in team (1) scoring positions.
4-Dec: 24 tasks outstanding; 8 in individual (8) scoring positions; 1 in team (1) scoring positions.
5-Dec: 18 tasks outstanding; 5 in individual (5) scoring positions; 1 in team (1) scoring positions.
6-Dec: 10 tasks outstanding; 3 in individual (3) scoring positions; 1 in team (1) scoring positions.
7-Dec: 9 tasks outstanding; 3 in individual (3) scoring positions; 1 in team (1) scoring positions.
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My lucky number is 75898524288+1 | |
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[DPC]CharleyVolunteer moderator
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ID: 95137
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The standings have been finalized and the overall challenge stats have been updated. See the link below in my signature for the running total.
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PrimeGrid Challenge Overall standings --- Last update: From Pi to Paddy (2016)
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Michael GoetzVolunteer moderator
Project administrator
Project scientist
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Joined: 21 Jan 10
Posts: 12387
ID: 53948
Credit: 178,060,290
RAC: 121,484
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Congratulations to the individual winners of the Leonids Challenge:
1. cnr04s
2. [DPC]x-RaY99_the_one_man_team
3. tiss
... and to the team winners:
1. Czech National Team
2. Aggie The Pew
3. Dutch Power Cows
Congratulations everyone!
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Please do not PM me with support questions. Ask on the forums instead. Thank you!
My lucky number is 75898524288+1 | |
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Message boards :
Number crunching :
Leonids Challenge |
