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Message boards : News : New SR5 Mega Prime!

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Van ZimmermanProject donor
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Joined: 30 Aug 12
Posts: 1881
ID: 168418
Credit: 5,130,088,683
RAC: 4,149,575
Discovered the World's First GFN-20 prime!!!Discovered 2 mega primesFound 1 prime in the 2018 Tour de Primes321 LLR Sapphire: Earned 20,000,000 credits (20,089,185)Cullen LLR Sapphire: Earned 20,000,000 credits (21,012,902)ESP LLR Sapphire: Earned 20,000,000 credits (20,089,407)Generalized Cullen/Woodall LLR Sapphire: Earned 20,000,000 credits (20,037,992)PPS LLR Sapphire: Earned 20,000,000 credits (20,999,495)PSP LLR Sapphire: Earned 20,000,000 credits (20,117,197)SoB LLR Sapphire: Earned 20,000,000 credits (21,208,789)SR5 LLR Sapphire: Earned 20,000,000 credits (20,278,667)SGS LLR Jade: Earned 10,000,000 credits (18,628,564)TRP LLR Sapphire: Earned 20,000,000 credits (20,619,871)Woodall LLR Jade: Earned 10,000,000 credits (16,927,546)Generalized Cullen/Woodall Sieve Sapphire: Earned 20,000,000 credits (20,359,057)PPS Sieve Double Amethyst: Earned 1,000,000,000 credits (1,051,222,753)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Jade: Earned 10,000,000 credits (10,189,695)TRP Sieve (suspended) Jade: Earned 10,000,000 credits (10,102,079)AP 26/27 Emerald: Earned 50,000,000 credits (51,669,540)GFN Double Ruby: Earned 2,000,000,000 credits (3,577,720,773)PSA Double Bronze: Earned 100,000,000 credits (188,814,621)
Message 110535 - Posted: 29 Sep 2017 | 14:22:32 UTC
Last modified: 25 Oct 2017 | 10:11:08 UTC

On 17 September 2017, 20:18:24 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=301562 by finding the mega prime:

301562*5^2408646-1

The prime is 1,683,577 digits long and will enter Chris Caldwell's The Largest Known Primes Database ranked 57th overall. 72 k's now remain in the Riesel Base 5 Problem.

The discovery was made by Håkan Lind (sangis43) of Sweden using an Intel(R) Core(TM) i7-5820K CPU @ 3.30GHz with 32 GB RAM running Microsoft Windows 7 Professional Edition. This computer took about 43 hours 57 minutes to complete the primality test using LLR. Håkan is a member of the Sicituradastra. Team.

The prime was verified on 24 October 2017, 13:28:04 UTC, by Nilay Khandelwal (Nilay Khandelwal) of India using an Intel(R) Core(TM) i7-4790K CPU @ 4.00 GHz with 16 GB RAM running Microsoft Windows 10 Professional Edition. This computer took about 2 days 12 hours 53 minutes to complete the primality test using LLR.

For more details, please see the official announcement.

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Message boards : News : New SR5 Mega Prime!

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