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Message boards : News : GFN-131072 Mega Prime!

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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
RAC: 3,165,502
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 (921,914,382)PSA Double Silver: Earned 200,000,000 credits (259,058,048)
Message 89658 - Posted: 11 Nov 2015 | 2:56:03 UTC
Last modified: 16 Nov 2015 | 4:02:12 UTC

On 9 Nov 2015, 18:02:51 UTC, PrimeGrid’s Generalized Fermat Prime Search found the Generalized Fermat mega prime:

42654182^131072+1

The prime is 1,000,075 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 14th for Generalized Fermat primes and 143rd overall. Of note, this find appears to be the first Titanic prime (>= 1000 digits) found using fixed-point numbers.

The discovery was made by Andrew M. Farrow (Nortech) of Australia using an NVIDIA GeForce GTX 960 in an Intel(R) Core(TM) i3-4170 CPU @ 3.70GHz with 4GB RAM running Linux. This GPU took about 1 hour 2 minutes to probable prime (PRP) test with GeneferOCL2.

The prime was verified by Patrick Schöfer (pschoefer) of Germany using an NVIDIA GeForce GTX 660 Ti in an Intel(R) Core(TM) i7-3770K CPU @ 3.50GHz with 16GB RAM running Windows 7 Professional. This computer took about 47 minutes to probable prime (PRP) test with GeneferOCL2. Patrick is a member of the SETI.Germany team.

For more details, please see the official announcement.

Profile pschoeferProject donor
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Found 2 primes in the 2018 Tour de Primes321 LLR Turquoise: Earned 5,000,000 credits (5,570,600)Cullen LLR Turquoise: Earned 5,000,000 credits (5,098,443)ESP LLR Turquoise: Earned 5,000,000 credits (9,085,104)Generalized Cullen/Woodall LLR Jade: Earned 10,000,000 credits (14,363,939)PPS LLR Turquoise: Earned 5,000,000 credits (9,277,645)PSP LLR Turquoise: Earned 5,000,000 credits (6,435,120)SoB LLR Turquoise: Earned 5,000,000 credits (7,584,477)SR5 LLR Turquoise: Earned 5,000,000 credits (5,890,852)SGS LLR Turquoise: Earned 5,000,000 credits (6,136,345)TPS LLR (retired) Bronze: Earned 10,000 credits (76,372)TRP LLR Turquoise: Earned 5,000,000 credits (7,767,011)Woodall LLR Turquoise: Earned 5,000,000 credits (8,281,303)321 Sieve (suspended) Silver: Earned 100,000 credits (209,833)Cullen/Woodall Sieve (suspended) Sapphire: Earned 20,000,000 credits (20,000,264)Generalized Cullen/Woodall Sieve Turquoise: Earned 5,000,000 credits (9,731,756)PPS Sieve Double Silver: Earned 200,000,000 credits (342,928,524)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (3,177,104)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (5,556,644)AP 26/27 Sapphire: Earned 20,000,000 credits (25,313,103)GFN Double Silver: Earned 200,000,000 credits (289,889,444)PSA Double Gold: Earned 500,000,000 credits (819,909,878)
Message 89662 - Posted: 11 Nov 2015 | 7:19:00 UTC - in response to Message 89658.

Nice. :)

I think that the runtimes are mixed up in the announcement and my GTX 660 Ti was actually the faster GPU, but I still had no chance to be primary checker as Andrew had already returned the WU before I even received it. Now trying to find my first mega prime as initial finder. 8)
____________

Scott BrownProject donor
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Joined: 17 Oct 05
Posts: 1770
ID: 1178
Credit: 5,552,888,404
RAC: 3,165,502
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 (921,914,382)PSA Double Silver: Earned 200,000,000 credits (259,058,048)
Message 89761 - Posted: 16 Nov 2015 | 4:03:02 UTC


Times are corrected. Thanks for letting me know.

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Message boards : News : GFN-131072 Mega Prime!

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