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Message boards : News : SR5 Mega Prime!

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Scott BrownProject donor
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Joined: 17 Oct 05
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Credit: 5,552,579,515
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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 (148,157,445)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 (241,094,106)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 86484 - Posted: 29 Jun 2015 | 2:29:43 UTC
Last modified: 29 Jun 2015 | 2:32:08 UTC

On 23 May 2015, 17:47:52 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=144052 by finding the mega prime:

144052*5^2018290+1

The prime is 1,410,730 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 54th overall. This is the largest known base 5 mega prime. 36 k's now remain in the Sierpinski Base 5 Problem.

The discovery was made by Wolfgang Schmidt (Artist) of Germany using an Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz with 16GB RAM running Linux. This computer took about 6 hours and 17 minutes to complete the primality test using LLR. Wolfgang is a member of the Special: Off-Topic team.

The prime was verified on 26 May 2015, 17:48:33 UTC, by user RoBorg of the United Kingdom using an Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz with 8GB RAM running Microsoft Windows 7 Professional. This computer took about 15 hours and 24 minutes to complete the primality test using LLR. RoBorg is a member of the Brony@Home team.

For more details, please see the official announcement.

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Message boards : News : SR5 Mega Prime!

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