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Message boards : News : Fermat Divisor!

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Scott BrownProject donor
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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 Stage2019 Tour de Primes highest prime countFound 22 primes in the 2019 Tour de Primes321 LLR Double Bronze: Earned 100,000,000 credits (100,829,118)Cullen LLR Double Bronze: Earned 100,000,000 credits (103,870,990)ESP LLR Double Bronze: Earned 100,000,000 credits (103,603,483)Generalized Cullen/Woodall LLR Double Bronze: Earned 100,000,000 credits (108,461,080)PPS LLR Double Silver: Earned 200,000,000 credits (339,247,040)PSP LLR Double Bronze: Earned 100,000,000 credits (108,003,110)SoB LLR Double Bronze: Earned 100,000,000 credits (135,694,213)SR5 LLR Double Bronze: Earned 100,000,000 credits (147,995,026)SGS LLR Double Bronze: Earned 100,000,000 credits (150,908,686)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 (101,447,725)321 Sieve Double Bronze: Earned 100,000,000 credits (130,884,640)Cullen/Woodall Sieve (suspended) Emerald: Earned 50,000,000 credits (83,794,448)Generalized Cullen/Woodall Sieve Double Silver: Earned 200,000,000 credits (285,113,439)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (2,107,523,112)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 (119,533,830)GFN Double Amethyst: Earned 1,000,000,000 credits (1,108,113,728)PSA Double Silver: Earned 200,000,000 credits (259,058,048)
Message 67482 - Posted: 1 Jul 2013 | 1:54:47 UTC
Last modified: 1 Jul 2013 | 2:26:42 UTC

On 18 June 2013 16:51:36 UTC, PrimeGrid's Proth Prime Search project found a prime Fermat divisor:

2145*2^1099064+1 Divides F(1099061)

The prime is 330,855 digits long and entered Chris Caldwell's The Largest Known Primes Database ranked 10th for prime Fermat divisors and 2629th overall.

The discovery was made by Sai Yik Tang (tomakey) of Malaysia using an Intel(R) Core(TM) i5-2400 CPU @ 3.10GHz with 4GB RAM running Microsoft Windows 7 Enterprise. This computer took about 8 minutes to complete the primality test using LLR.

The prime was verified on 21 June 2013 1:43:48 UTC by Timothy Hitch (Tim) using an Intel(R) Core(TM)2 Duo CPU T8300 @ 2.40GHz with 4 GB RAM running Microsoft Windows 7 Ultimate. This computer took about 33 minutes to complete the primality test using LLR.

For more details, please see the official announcement.
____________
141941*2^4299438-1 is prime!


Message boards : News : Fermat Divisor!

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