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

Returning Participants

Community

Leader Boards

Results

Other

drummers-lowrise

Advanced search

Message boards : News : World Record GFN Prime!

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: 5,465,057,827
RAC: 3,399,738
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 (128,546,336)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 (101,287,771)GFN Double Gold: Earned 500,000,000 credits (875,152,967)PSA Double Silver: Earned 200,000,000 credits (259,058,048)
Message 57225 - Posted: 21 Aug 2012 | 12:33:08 UTC

On 8 Aug 2012, 8:58:58 UTC, PrimeGrid’s Generalized Fermat Prime Search found the largest known Generalized Fermat mega prime:
475856^524288+1

The prime is 2,976,633 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 1st for Generalized Fermat primes and 11th overall.

The discovery was made by Masashi Kumagai (ragnarag) of Japan using an NVIDIA GeForce GTS 450 in an AMD FX(tm)-8150 CPU with 8GB RAM, running 64 bit Windows 7. This GPU took 7 hours 47 minutes to probable prime (PRP) test with GeneferCUDA. Masashi Kumagai is a member of the Team 2ch team.

The prime was verified by Jason Preszler (Jason Preszler) of the United States using an Intel Core i7-2600 CPU @ 3.40GHz with 12GB RAM, running 64 bit LINUX . This computer took 46 hours 55 minutes to probable prime (PRP) test with GenefX64. Jason is a member of the Turan@BOINC team.

For more details, please see the official announcement.

[DPC]Charley
Volunteer moderator
Project scientist
Send message
Joined: 15 Apr 11
Posts: 803
ID: 95137
Credit: 94,979,517
RAC: 0
321 LLR Amethyst: Earned 1,000,000 credits (1,009,885)Cullen LLR Amethyst: Earned 1,000,000 credits (1,440,123)ESP LLR Amethyst: Earned 1,000,000 credits (1,008,511)PPS LLR Ruby: Earned 2,000,000 credits (2,389,215)PSP LLR Amethyst: Earned 1,000,000 credits (1,080,442)SoB LLR Amethyst: Earned 1,000,000 credits (1,143,918)SR5 LLR Amethyst: Earned 1,000,000 credits (1,853,162)SGS LLR Amethyst: Earned 1,000,000 credits (1,344,963)TRP LLR Amethyst: Earned 1,000,000 credits (1,140,037)Woodall LLR Amethyst: Earned 1,000,000 credits (1,130,355)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,038,617)PPS Sieve Sapphire: Earned 20,000,000 credits (36,643,348)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,000,717)TRP Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,298,244)GFN Jade: Earned 10,000,000 credits (17,332,530)PSA Sapphire: Earned 20,000,000 credits (20,125,451)
Message 57226 - Posted: 21 Aug 2012 | 12:50:09 UTC

Hiphip, hooray! :) Congratulations all round and several extra helpings for ragnarag and Jason! Lets keep'm coming!
____________
PrimeGrid Challenge Overall standings --- Last update: From Pi to Paddy (2016)

Iain BethuneProject donor
Volunteer moderator
Project administrator
Volunteer developer
Volunteer tester
Project scientist
Send message
Joined: 28 Jan 09
Posts: 1584
ID: 34775
Credit: 189,285,745
RAC: 109,163
321 LLR Gold: Earned 500,000 credits (597,175)Cullen LLR Amethyst: Earned 1,000,000 credits (1,355,381)ESP LLR Turquoise: Earned 5,000,000 credits (5,048,594)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,564,412)PPS LLR Amethyst: Earned 1,000,000 credits (1,025,115)PSP LLR Sapphire: Earned 20,000,000 credits (28,367,849)SoB LLR Jade: Earned 10,000,000 credits (11,445,031)SR5 LLR Turquoise: Earned 5,000,000 credits (5,189,992)SGS LLR Amethyst: Earned 1,000,000 credits (1,244,067)TRP LLR Turquoise: Earned 5,000,000 credits (5,169,405)Woodall LLR Amethyst: Earned 1,000,000 credits (1,070,956)321 Sieve (suspended) Bronze: Earned 10,000 credits (20,003)Cullen/Woodall Sieve (suspended) Silver: Earned 100,000 credits (200,371)Generalized Cullen/Woodall Sieve Jade: Earned 10,000,000 credits (11,645,025)PPS Sieve Turquoise: Earned 5,000,000 credits (7,536,532)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,017,144)TRP Sieve (suspended) Gold: Earned 500,000 credits (554,946)AP 26/27 Ruby: Earned 2,000,000 credits (3,577,848)GFN Emerald: Earned 50,000,000 credits (97,047,976)PSA Ruby: Earned 2,000,000 credits (4,606,694)
Message 57233 - Posted: 21 Aug 2012 | 19:36:13 UTC - in response to Message 57226.

A great achievement, and congratulations to the lucky finders!

Looks we will have a lock-out on the top11 spot for some time as the GFN524288 search continues. Breaking into the top 10 is still a long way off - unless we start testing at N=1048576...?
____________
Twitter: IainBethune
Proud member of team "Aggie The Pew". Go Aggie!
3073428256125*2^1290000-1 is Prime!

Post to thread

Message boards : News : World Record GFN Prime!

[Return to PrimeGrid main page]
Copyright © 2005 - 2018 Rytis Slatkevičius (contact) and PrimeGrid community. Server load 1.81, 1.40, 1.39
Generated 13 Nov 2018 | 21:06:22 UTC