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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: 1767
ID: 168418
Credit: 4,249,929,007
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Discovered the World's First GFN-20 prime!!!Discovered 2 mega primesFound 1 prime in the 2018 Tour de Primes321 LLR Jade: Earned 10,000,000 credits (12,590,282)Cullen LLR Jade: Earned 10,000,000 credits (11,383,059)ESP LLR Jade: Earned 10,000,000 credits (10,638,315)Generalized Cullen/Woodall LLR Jade: Earned 10,000,000 credits (12,547,227)PPS LLR Jade: Earned 10,000,000 credits (19,946,849)PSP LLR Jade: Earned 10,000,000 credits (19,655,325)SoB LLR Sapphire: Earned 20,000,000 credits (21,208,789)SR5 LLR Jade: Earned 10,000,000 credits (13,730,961)SGS LLR Jade: Earned 10,000,000 credits (11,287,785)TRP LLR Jade: Earned 10,000,000 credits (17,222,880)Woodall LLR Jade: Earned 10,000,000 credits (12,964,368)Generalized Cullen/Woodall Sieve Sapphire: Earned 20,000,000 credits (20,199,057)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 (50,488,984)GFN Double Ruby: Earned 2,000,000,000 credits (2,776,322,968)PSA Double Bronze: Earned 100,000,000 credits (168,236,054)
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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