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Message boards : News : And Another GFN-262144 Find!!

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Scott BrownProject donor
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Discovered the World's First base 116 Generalized Cullen prime!!!Discovered 18 mega primesEliminated 7 conjecture "k"sDiscovered 1 Sophie Germain pairDiscovered 2 Fermat divisors2012 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 Stage2019 Tour de Primes highest prime countFound 22 primes in the 2019 Tour de Primes321 LLR Double Bronze: Earned 100,000,000 credits (110,931,288)Cullen LLR Double Bronze: Earned 100,000,000 credits (103,870,990)ESP LLR Double Bronze: Earned 100,000,000 credits (137,499,413)Generalized Cullen/Woodall LLR Double Bronze: Earned 100,000,000 credits (108,461,080)PPS LLR Double Silver: Earned 200,000,000 credits (475,334,393)PSP LLR Double Bronze: Earned 100,000,000 credits (126,923,852)SoB LLR Double Bronze: Earned 100,000,000 credits (135,747,083)SR5 LLR Double Silver: Earned 200,000,000 credits (201,224,339)SGS LLR Double Bronze: Earned 100,000,000 credits (162,580,085)TPS LLR (retired) Silver: Earned 100,000 credits (235,439)TRP LLR Double Bronze: Earned 100,000,000 credits (121,443,822)Woodall LLR Double Bronze: Earned 100,000,000 credits (101,447,725)321 Sieve Double Silver: Earned 200,000,000 credits (210,661,867)Cullen/Woodall Sieve (suspended) Emerald: Earned 50,000,000 credits (83,794,448)Generalized Cullen/Woodall Sieve (suspended) Double Silver: Earned 200,000,000 credits (285,139,652)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (2,130,456,025)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 Silver: Earned 200,000,000 credits (211,467,607)GFN Double Amethyst: Earned 1,000,000,000 credits (1,489,073,463)PSA Double Silver: Earned 200,000,000 credits (259,058,048)
Message 135952 - Posted: 24 Dec 2019 | 16:36:57 UTC

On 5 December 2019, 08:39:29 UTC, PrimeGrid's Generalized Fermat Prime Search found the Mega Prime:

9125820^262144+1

The prime is 1,824,594 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 14th for Generalized Fermat primes and 82nd overall.

The discovery was made by Yoshimitsu Kato (yoshi) of Japan using a GeForce GTX 1660 Ti in an Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz with 16GB RAM, running Microsoft Windows 10. This GPU took about 22 minutes to complete the probable prime (PRP) test using Genefer OCL2. Yoshimitsu Kato is a member of Team JPN.

The prime was verified on 5 December 2019, 08:41:59 UTC by Igor Keller (IKI) of France using a GeForce GTX 1080 in an Intel(R) Core(TM) i5-4460 CPU @ 3.20GHz with 16GB RAM, running Microsoft Windows 8.1. This GPU took about 26 minutes to complete the probable prime (PRP) test using Genefer OCL2. Igor Keller is a member of the Gridcoin team.

The PRP was confirmed prime by an Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz with 16GB RAM, running Microsoft Windows 10 Professional x64 Edition. This computer took about 16 hours, 30 minutes to complete the primality test using multithreaded LLR.

For more details, please see the official announcement.

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Message boards : News : And Another GFN-262144 Find!!

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