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Message boards : News : GFN-262144 Mega Prime!

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Van ZimmermanProject donor
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Joined: 30 Aug 12
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Discovered the World's First GFN-20 prime!!!Discovered 2 mega primesFound 1 prime in the 2018 Tour de Primes321 LLR Jade: Earned 10,000,000 credits (12,590,282)Cullen LLR Jade: Earned 10,000,000 credits (11,383,059)ESP LLR Jade: Earned 10,000,000 credits (10,638,315)Generalized Cullen/Woodall LLR Jade: Earned 10,000,000 credits (12,547,227)PPS LLR Sapphire: Earned 20,000,000 credits (20,030,899)PSP LLR Jade: Earned 10,000,000 credits (19,679,114)SoB LLR Sapphire: Earned 20,000,000 credits (21,208,789)SR5 LLR Jade: Earned 10,000,000 credits (13,730,961)SGS LLR Jade: Earned 10,000,000 credits (11,287,785)TRP LLR Jade: Earned 10,000,000 credits (17,909,751)Woodall LLR Jade: Earned 10,000,000 credits (12,964,368)Generalized Cullen/Woodall Sieve Sapphire: Earned 20,000,000 credits (20,199,057)PPS Sieve Double Amethyst: Earned 1,000,000,000 credits (1,051,222,753)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (10,189,695)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,102,079)AP 26/27 Emerald: Earned 50,000,000 credits (50,493,027)GFN Double Ruby: Earned 2,000,000,000 credits (2,785,454,834)PSA Double Bronze: Earned 100,000,000 credits (168,236,054)
Message 113952 - Posted: 30 Jan 2018 | 12:15:06 UTC

On 27 January 2018, 20:06:08 UTC, PrimeGrid’s Generalized Fermat Prime Search found the Generalized Fermat mega prime:

3933508^262144+1

The prime is 1,728,783 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 7th for Generalized Fermat primes and 57th overall.

The discovery was made by Alen Kecic (freezing) of Germany using an NVIDIA GeForce GTX 1060 in an Intel(R) Core(TM) i7-7820X CPU at 3.60GHz with 32GB RAM, running Windows 10 Professional Edition. This GPU took about 26 minutes to probable prime (PRP) test with GeneferOCL3. Alen is a member of the SETI.Germany team.

The prime was verified on 29 January 2018, 20:09:57 by Arne Sielemann ([SG-FC] dingdong) of Germany using an AMD R9 290/HD 7900 (Tahiti) series GPU in an Intel(R) Core(TM) i7-3770K CPU at 3.50GHz with 16GB RAM, running Windows 10 Core Edition. This GPU took about 56 minutes to probable prime (PRP) test with GeneferOCL5. Arne is a member of the SETI.Germany team.

The PRP was confirmed prime by an Intel(R) Core(TM) i7-7700K CPU @ 4.20GHz with 16GB RAM, running Microsoft Windows 10 Professional. This computer took about 4 hours 33 minutes to complete the primality test using LLR.

For more details please see the official announcement.

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Message boards : News : GFN-262144 Mega Prime!

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