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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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ID: 168418
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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 Sapphire: Earned 20,000,000 credits (20,089,185)Cullen LLR Jade: Earned 10,000,000 credits (15,483,829)ESP LLR Sapphire: Earned 20,000,000 credits (20,089,407)Generalized Cullen/Woodall LLR Sapphire: Earned 20,000,000 credits (20,037,992)PPS LLR Sapphire: Earned 20,000,000 credits (20,940,913)PSP LLR Sapphire: Earned 20,000,000 credits (20,117,197)SoB LLR Sapphire: Earned 20,000,000 credits (21,208,789)SR5 LLR Jade: Earned 10,000,000 credits (17,248,562)SGS LLR Jade: Earned 10,000,000 credits (14,134,778)TRP LLR Sapphire: Earned 20,000,000 credits (20,619,871)Woodall LLR Jade: Earned 10,000,000 credits (16,927,546)Generalized Cullen/Woodall Sieve Sapphire: Earned 20,000,000 credits (20,326,839)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 (51,669,540)GFN Double Ruby: Earned 2,000,000,000 credits (3,407,312,726)PSA Double Bronze: Earned 100,000,000 credits (187,094,621)
Message 111757 - Posted: 20 Nov 2017 | 11:38:33 UTC
Last modified: 4 Dec 2017 | 17:50:17 UTC

On 16 November 2017, 15:38:45 UTC, PrimeGrid’s Generalized Fermat Prime Search found the Generalized Fermat mega prime:

3596074^262144+1

The prime is 1,718,572 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 6th for Generalized Fermat primes and 53rd overall.

The discovery was made by Howard Gordon ([PST]Howard) of the United Kingdom using a Nvidia GeForce GTX 1060 in an AMD Ryzen 1950X with 32GB RAM, running Microsoft Windows 10 Core Edition. This GPU took about 30 minutes to probable prime (PRP) test with GeneferOCL3. Howard is a member of the PrimeSearchTeam team.

The prime was verified on 30 November 2017, 01:04:13 UTC, by user Brian Uitti of the United States using an Intel(R) Core(TM) i5 M 520 CPU @ 2.4GHz with 4GB RAM, running Linux. This CPU took about 3 days, 12 hours, 6 minutes to probable prime (PRP) test with Genefer. Brian is a member of the Project Blue Book team.

The PRP was confirmed prime by an Intel(R) Core(TM) i5-4670K CPU @ 3.40GHz with 24GB RAM, running Microsoft Windows 7 Professional Edition. This computer took about 10 hours 10 minutes to complete the primality test using multithreaded LLR.

For more details, please see the official announcement.

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Message boards : News : GFN-262144 Mega Prime!

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