PrimeGrid
Please visit donation page to help the project cover running costs for this month

Sponsored by:

Hosted at and sponsored by Rackspace.

Join PrimeGrid

  1. Read our rules and policies.
  2. Download, install and run the BOINC software used by PrimeGrid.
  3. When prompted, enter the URL:
    http://www.primegrid.com/
  4. Select which subprojects to run via the PrimeGrid Preferences.

Returning Participants

Community

Leader Boards

Results

Other

drummers-lowrise

Advanced search

Message boards : News : Factorial Prime Found!

Post to thread Subscribe Sort
Author Message
Scott BrownProject donor
Volunteer moderator
Project administrator
Volunteer tester
Project scientist
Avatar
Send message
Joined: 17 Oct 05
Posts: 1750
ID: 1178
Credit: 5,464,969,838
RAC: 3,405,063
Discovered the World's First base 116 Generalized Cullen prime!!!Discovered 12 mega primesEliminated 6 conjecture "k"sDiscovered 1 Sophie Germain pairDiscovered 1 Fermat divisor2012 Tour de Primes highest prime count2012 Tour de Primes most Mountain Stage primes2015 Tour de Primes highest prime count2016 Tour de Primes highest prime countFound 23 primes in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de PrimesFound 2 primes in the 2018 Tour de Primes Mountain Stage321 LLR Double Bronze: Earned 100,000,000 credits (100,829,118)Cullen LLR Double Bronze: Earned 100,000,000 credits (103,702,522)ESP LLR Double Bronze: Earned 100,000,000 credits (103,603,483)Generalized Cullen/Woodall LLR Double Bronze: Earned 100,000,000 credits (102,075,655)PPS LLR Double Silver: Earned 200,000,000 credits (303,052,366)PSP LLR Emerald: Earned 50,000,000 credits (80,100,999)SoB LLR Double Bronze: Earned 100,000,000 credits (116,841,417)SR5 LLR Double Bronze: Earned 100,000,000 credits (128,539,392)SGS LLR Double Bronze: Earned 100,000,000 credits (143,876,598)TPS LLR (retired) Silver: Earned 100,000 credits (235,439)TRP LLR Double Bronze: Earned 100,000,000 credits (109,149,031)Woodall LLR Double Bronze: Earned 100,000,000 credits (100,539,349)321 Sieve (suspended) Turquoise: Earned 5,000,000 credits (8,322,150)Cullen/Woodall Sieve (suspended) Emerald: Earned 50,000,000 credits (83,794,448)Generalized Cullen/Woodall Sieve Double Silver: Earned 200,000,000 credits (234,207,567)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (2,105,652,207)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Double Silver: Earned 200,000,000 credits (203,523,358)TRP Sieve (suspended) Double Silver: Earned 200,000,000 credits (201,489,157)AP 26/27 Double Bronze: Earned 100,000,000 credits (101,275,642)GFN Double Gold: Earned 500,000,000 credits (875,150,886)PSA Double Silver: Earned 200,000,000 credits (259,058,048)
Message 70107 - Posted: 17 Oct 2013 | 1:31:59 UTC

On 30 August 2013, PrimeGrid’s PRPNet found the 2nd largest known Factorial prime:

147855!-1

The prime is 700,177 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 2nd for Factorial primes and 191st overall.

The discovery was made by Pietari Snow (Lumiukko) of Finland using an Intel(R) Core(TM) i7 CPU 940 @ 2.93GHz with 6 GB RAM running Linux. This computer took just a little over 69 hours and 37 minutes to complete the primality test using pfgw. Pietari is a member of the PrimeSearchTeam.

For more details, please see the official announcement.

ID: 70107 | Report as offensive    Reply Quote
Profile JHAPAProject donor
Avatar
Send message
Joined: 11 Sep 09
Posts: 121
ID: 46756
Credit: 122,542,909
RAC: 0
321 LLR Silver: Earned 100,000 credits (118,919)Cullen LLR Silver: Earned 100,000 credits (147,908)PPS LLR Bronze: Earned 10,000 credits (50,225)PSP LLR Silver: Earned 100,000 credits (234,507)SoB LLR Silver: Earned 100,000 credits (402,788)SR5 LLR Bronze: Earned 10,000 credits (34,004)SGS LLR Bronze: Earned 10,000 credits (25,034)TRP LLR Silver: Earned 100,000 credits (119,746)Woodall LLR Silver: Earned 100,000 credits (303,365)321 Sieve (suspended) Bronze: Earned 10,000 credits (35,967)Cullen/Woodall Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,427,885)PPS Sieve Double Bronze: Earned 100,000,000 credits (118,435,229)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Bronze: Earned 10,000 credits (14,505)TRP Sieve (suspended) Bronze: Earned 10,000 credits (78,735)AP 26/27 Bronze: Earned 10,000 credits (24,502)PSA Amethyst: Earned 1,000,000 credits (1,080,000)
Message 70158 - Posted: 18 Oct 2013 | 18:29:01 UTC - in response to Message 70107.

Gratulation to Lumiukko...great shot!
JHAPA
____________

ID: 70158 | Report as offensive    Reply Quote
Profile Rick Reynolds
Avatar
Send message
Joined: 13 Aug 10
Posts: 6309
ID: 65483
Credit: 3,430,744,146
RAC: 732,147
Discovered 1 mega primeFound 2 primes in the 2018 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,148,880)Cullen LLR Ruby: Earned 2,000,000 credits (2,773,730)ESP LLR Ruby: Earned 2,000,000 credits (2,084,793)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,686,707)PPS LLR Jade: Earned 10,000,000 credits (11,154,829)PSP LLR Amethyst: Earned 1,000,000 credits (1,169,582)SoB LLR Ruby: Earned 2,000,000 credits (2,798,257)SR5 LLR Jade: Earned 10,000,000 credits (11,169,992)SGS LLR Turquoise: Earned 5,000,000 credits (5,943,634)TRP LLR Turquoise: Earned 5,000,000 credits (5,110,887)Woodall LLR Ruby: Earned 2,000,000 credits (3,336,520)321 Sieve (suspended) Bronze: Earned 10,000 credits (54,591)Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (127,922,665)Generalized Cullen/Woodall Sieve Turquoise: Earned 5,000,000 credits (8,686,514)PPS Sieve Double Amethyst: Earned 1,000,000,000 credits (1,655,954,320)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Turquoise: Earned 5,000,000 credits (8,134,964)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (7,013,696)AP 26/27 Emerald: Earned 50,000,000 credits (94,214,029)GFN Double Bronze: Earned 100,000,000 credits (107,690,302)PSA Double Amethyst: Earned 1,000,000,000 credits (1,370,700,486)
Message 70159 - Posted: 18 Oct 2013 | 18:36:10 UTC

Congrats on this find! Well done.
____________
@AggieThePew

ID: 70159 | Report as offensive    Reply Quote
Post to thread

Message boards : News : Factorial Prime Found!

[Return to PrimeGrid main page]
Copyright © 2005 - 2018 Rytis Slatkevičius (contact) and PrimeGrid community. Server load 1.37, 1.53, 1.30
Generated 13 Nov 2018 | 20:48:39 UTC