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Message boards : News : GFN-262144 Mega Prime March Edition!

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Scott BrownProject donor
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Joined: 17 Oct 05
Posts: 1770
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Credit: 5,552,888,404
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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 Stage321 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 (102,075,655)PPS LLR Double Silver: Earned 200,000,000 credits (303,052,366)PSP LLR Emerald: Earned 50,000,000 credits (89,861,104)SoB LLR Double Bronze: Earned 100,000,000 credits (116,841,417)SR5 LLR Double Bronze: Earned 100,000,000 credits (129,423,098)SGS LLR Double Bronze: Earned 100,000,000 credits (148,157,565)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 (101,374,592)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 (241,095,198)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (2,105,665,691)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 Gold: Earned 500,000,000 credits (922,065,310)PSA Double Silver: Earned 200,000,000 credits (259,058,048)
Message 93622 - Posted: 30 Mar 2016 | 4:03:43 UTC

On 5 March 2016, 18:56:52 UTC, PrimeGrid’s Generalized Fermat Prime Search found the Generalized Fermat mega prime:

1488256^262144+1

The prime is 1,618,131 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 5th for Generalized Fermat primes and 43rd overall.

The discovery was made by Stefan Larsson (288larsson) of Sweden using an AMD Hawaii in an Intel(R) Core(TM) i5-4670K CPU @ 3.40GHz with 8GB RAM, running Linux. This GPU took about 27 minutes to probable prime (PRP) test with GeneferOCL4. Stefan is a member of the Sicituradastra. team.

The prime was verified on 5 March 2016, 19:25:40 UTC by Dirk Kraemer (DoctorNow) of Germany using an NVIDIA GeForce GTX 760 in an AMD Phenom(tm) II X6 1045T Processor with 12GB RAM, running Windows Vista Home Premium. This GPU took about 1 hour and 5 minutes to probable prime (PRP) test with GeneferOCL3. Dirk is a member of the BOINC Confederation team.

For more details, please see the official announcement.

[CSF] Thomas H.V. DupontProject donor
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Joined: 22 Jan 16
Posts: 427
ID: 436840
Credit: 23,685,239
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321 LLR Bronze: Earned 10,000 credits (18,114)Cullen LLR Bronze: Earned 10,000 credits (34,704)ESP LLR Bronze: Earned 10,000 credits (26,640)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (15,312)PPS LLR Bronze: Earned 10,000 credits (78,903)SoB LLR Silver: Earned 100,000 credits (121,578)SR5 LLR Bronze: Earned 10,000 credits (25,295)SGS LLR Gold: Earned 500,000 credits (507,221)Generalized Cullen/Woodall Sieve Silver: Earned 100,000 credits (113,599)PPS Sieve Jade: Earned 10,000,000 credits (17,893,268)TRP Sieve (suspended) Bronze: Earned 10,000 credits (26,191)AP 26/27 Gold: Earned 500,000 credits (711,568)GFN Amethyst: Earned 1,000,000 credits (1,639,126)PSA Ruby: Earned 2,000,000 credits (2,473,720)
Message 93646 - Posted: 30 Mar 2016 | 16:54:14 UTC - in response to Message 93622.

Congratulations to Stefan and Dirk!
Thanks Scott for the announcement.
____________
Founder of CRUNCHERS SANS FRONTIERES
www.crunchersansfrontieres.org
CSF lucky number 22872882^65536+1

JeppeSNProject donor
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Joined: 5 Apr 14
Posts: 744
ID: 306875
Credit: 9,682,498
RAC: 3,553
321 LLR Bronze: Earned 10,000 credits (48,835)Cullen LLR Bronze: Earned 10,000 credits (98,851)ESP LLR Bronze: Earned 10,000 credits (13,226)PPS LLR Amethyst: Earned 1,000,000 credits (1,633,180)SoB LLR Silver: Earned 100,000 credits (132,293)SR5 LLR Bronze: Earned 10,000 credits (16,010)TRP LLR Bronze: Earned 10,000 credits (14,746)Woodall LLR Silver: Earned 100,000 credits (109,455)PSA Turquoise: Earned 5,000,000 credits (7,614,290)
Message 93680 - Posted: 31 Mar 2016 | 15:34:42 UTC

This was a cool find! We now know nine GFN262144 primes. I want ten to fill out that row in the table of smallest bases b giving generalized Fermat primes. /JeppeSN

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Message boards : News : GFN-262144 Mega Prime March Edition!

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