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Message boards : News : SR5 Mega Prime!

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Joined: 10 May 14
Posts: 96
ID: 311759
Credit: 102,408,382
RAC: 110,909
Discovered 1 mega primeFound 1 prime in the 2018 Tour de PrimesFound 1 mega prime in the 2018 Tour de Primes321 LLR Gold: Earned 500,000 credits (501,251)Cullen LLR Gold: Earned 500,000 credits (507,205)ESP LLR Gold: Earned 500,000 credits (516,221)Generalized Cullen/Woodall LLR Gold: Earned 500,000 credits (500,544)PPS LLR Gold: Earned 500,000 credits (601,673)PSP LLR Gold: Earned 500,000 credits (530,606)SoB LLR Gold: Earned 500,000 credits (507,131)SR5 LLR Gold: Earned 500,000 credits (501,196)SGS LLR Gold: Earned 500,000 credits (770,850)TRP LLR Silver: Earned 100,000 credits (289,457)Woodall LLR Silver: Earned 100,000 credits (468,677)321 Sieve Gold: Earned 500,000 credits (509,254)Generalized Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (2,000,420)PPS Sieve Sapphire: Earned 20,000,000 credits (22,407,037)AP 26/27 Sapphire: Earned 20,000,000 credits (20,053,280)GFN Sapphire: Earned 20,000,000 credits (31,672,607)PSA Sapphire: Earned 20,000,000 credits (20,070,245)
Message 140163 - Posted: 10 May 2020 | 20:10:18 UTC

On 1 May 2020, 04:01:08 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=118568 by finding the mega prime:

118568*5^3112069+1

The prime is 2,175,248 digits long and enters Chris Caldwell's “The Largest Known Primes Database” ranked 70th overall and is the largest known base 5 prime. 30 k’s now remain in the Sierpinski Base 5 problem.

The discovery was made by Honza Cholt (Honza) of the Czech Republic using an Intel(R) Core(TM) i7-9700K CPU @ 3.60GHz with 32GB RAM, running Microsoft Windows 10 Professional x64 Edition. This computer took about 49 minutes to complete the primality test using LLR. Honza Cholt is a member of Czech National Team.

The prime was verified on 2 May 2020, 09:00:41 UTC by Tom Murphy VII (brighterorange) of the United States using an AMD Ryzen Threadripper 2990WX 32-Core Processor with 128GB RAM, running Microsoft Windows 10 Professional x64 Edition. This computer took about 1 day, 1 hour, 55 minutes to complete the primality test using LLR.

For more details, please see the official announcement.

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Message boards : News : SR5 Mega Prime!

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