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Message boards : News : SR5 Mega Prime Find!

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Scott BrownProject donor
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Joined: 17 Oct 05
Posts: 2297
ID: 1178
Credit: 13,149,036,370
RAC: 11,441,076
Discovered the World's First base 116 Generalized Cullen prime!!!Discovered 37 mega primesEliminated 7 conjecture "k"sDiscovered 1 Sophie Germain pairDiscovered 2 Fermat divisors2012 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 Primes2020 Tour de Primes highest prime scoreFound 21 primes in the 2020 Tour de PrimesFound 4 mega primes in the 2020 Tour de PrimesFound 8 primes in the 2021 Tour de PrimesFound 1 mega prime in the 2021 Tour de Primes321 LLR Double Silver: Earned 200,000,000 credits (201,403,028)Cullen LLR Double Silver: Earned 200,000,000 credits (201,409,561)ESP LLR Double Silver: Earned 200,000,000 credits (214,825,147)Generalized Cullen/Woodall LLR Double Silver: Earned 200,000,000 credits (201,112,468)PPS LLR Double Gold: Earned 500,000,000 credits (810,537,196)PSP LLR Double Silver: Earned 200,000,000 credits (201,749,918)SoB LLR Double Silver: Earned 200,000,000 credits (207,028,068)SR5 LLR Double Silver: Earned 200,000,000 credits (214,437,634)SGS LLR Double Silver: Earned 200,000,000 credits (205,718,935)TPS LLR (retired) Silver: Earned 100,000 credits (235,439)TRP LLR Double Silver: Earned 200,000,000 credits (201,215,056)Woodall LLR Double Silver: Earned 200,000,000 credits (201,651,344)321 Sieve (suspended) Double Silver: Earned 200,000,000 credits (235,451,253)Cullen/Woodall Sieve (suspended) Emerald: Earned 50,000,000 credits (83,794,448)Generalized Cullen/Woodall Sieve (suspended) Double Silver: Earned 200,000,000 credits (285,139,652)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (2,736,238,209)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 Gold: Earned 500,000,000 credits (512,586,204)GFN Double Ruby: Earned 2,000,000,000 credits (2,294,457,519)WW Double Ruby: Earned 2,000,000,000 credits (3,476,180,000)PSA Double Silver: Earned 200,000,000 credits (259,058,048)
Message 152477 - Posted: 3 Dec 2021 | 20:12:53 UTC

On 8 October 2021, 01:38:53 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=102818 by finding the mega prime:

102818*5^3440382-1

The prime is 2,404,729 digits long and enters Chris Caldwell's “The Largest Known Primes Database” ranked 96th overall. 61 k’s now remain in the Riesel Base 5 problem.

The discovery was made by Wes Hewitt (emoga) of Canada using an AMD Ryzen 9 5950X 16-Core Processor with 32GB RAM, running Microsoft Windows 10 Professional x64 Edition. This computer took about 1 hour, 29 minutes to complete the primality test using LLR2. Wes Hewitt is a member of TeAm AnandTech team.

The prime was verified on 10 October 2021, 20:14 UTC, by an Intel(R) Core(TM) i7-9800X CPU @ 3.80GHz with 32GB of RAM, running CentOS. This computer took 20 hours and 39 minutes to complete the primality test using LLR2.

For more details, please see the official announcement.

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Joined: 3 Aug 16
Posts: 14
ID: 453662
Credit: 26,609,845
RAC: 28,150
321 LLR Silver: Earned 100,000 credits (248,304)Cullen LLR Gold: Earned 500,000 credits (572,367)ESP LLR Silver: Earned 100,000 credits (337,580)Generalized Cullen/Woodall LLR Gold: Earned 500,000 credits (837,735)PPS LLR Jade: Earned 10,000,000 credits (15,612,229)PSP LLR Amethyst: Earned 1,000,000 credits (1,125,335)SoB LLR Amethyst: Earned 1,000,000 credits (1,445,573)SR5 LLR Ruby: Earned 2,000,000 credits (2,107,614)SGS LLR Silver: Earned 100,000 credits (186,436)TRP LLR Amethyst: Earned 1,000,000 credits (1,273,116)Woodall LLR Silver: Earned 100,000 credits (370,841)321 Sieve (suspended) Silver: Earned 100,000 credits (132,955)Generalized Cullen/Woodall Sieve (suspended) Gold: Earned 500,000 credits (502,930)PPS Sieve Silver: Earned 100,000 credits (411,262)AP 26/27 Silver: Earned 100,000 credits (440,687)GFN Gold: Earned 500,000 credits (765,840)WW Silver: Earned 100,000 credits (240,000)
Message 152480 - Posted: 4 Dec 2021 | 2:19:21 UTC - in response to Message 152477.
Last modified: 4 Dec 2021 | 2:19:35 UTC

Well done!

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Message boards : News : SR5 Mega Prime Find!

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