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Message boards : News : Deja Vu: World Record SR5 Discovery

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Profile Michael GoetzProject donor
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The "Shut up already!" badge:  This loud mouth has mansplained on the forums over 10 thousand times!  Sheesh!!!Discovered the World's First GFN-19 prime!!!Discovered 1 mega primeFound 1 prime in the 2018 Tour de Primes321 LLR Amethyst: Earned 1,000,000 credits (1,504,899)Cullen LLR Ruby: Earned 2,000,000 credits (2,005,249)ESP LLR Ruby: Earned 2,000,000 credits (2,001,789)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,004,898)PPS LLR Ruby: Earned 2,000,000 credits (2,082,200)PSP LLR Ruby: Earned 2,000,000 credits (2,632,269)SoB LLR Sapphire: Earned 20,000,000 credits (24,516,335)SR5 LLR Turquoise: Earned 5,000,000 credits (7,216,756)SGS LLR Ruby: Earned 2,000,000 credits (2,010,466)TRP LLR Ruby: Earned 2,000,000 credits (2,433,520)Woodall LLR Amethyst: Earned 1,000,000 credits (1,920,417)321 Sieve (suspended) Silver: Earned 100,000 credits (200,576)Cullen/Woodall Sieve (suspended) Ruby: Earned 2,000,000 credits (4,170,256)Generalized Cullen/Woodall Sieve Ruby: Earned 2,000,000 credits (2,808,737)PPS Sieve Sapphire: Earned 20,000,000 credits (20,110,788)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Amethyst: Earned 1,000,000 credits (1,035,522)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,051,121)AP 26/27 Turquoise: Earned 5,000,000 credits (6,499,818)GFN Emerald: Earned 50,000,000 credits (52,696,314)PSA Jade: Earned 10,000,000 credits (10,038,118)
Message 73333 - Posted: 9 Feb 2014 | 17:16:37 UTC

On 6 February 2014, 16:02:23 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=22934 by finding the mega prime:

22934*5^1536762-1

The prime is 1,074,155 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 61st overall. This is the largest known base 5 mega prime. 86 k's now remain in the Riesel Base 5 Problem.

The discovery was made by Keishi Toda (yuyusuke@jisaku) of Japan using an Intel(R) Core(TM) i7-3930K CPU @ 3.20GHz with 14GB RAM running Microsoft Windows 7 Home Premium. This computer took about 9 hours and 2 minutes to complete the primality test using LLR. Keishi is a member of the Team 2ch team.

This is the second world record base 5 SR5 mega prime Keishi has discovered in approximately one week's time!

The prime was verified on 2 February 2014 0:15:42 UTC, by Scott Brown (Scott Brown) of the United States using an Intel(R) Core(TM)2 Duo CPU E8400 @ 3.00GHz with 4 GB RAM running Microsoft Windows 7 Enterprise. This computer took about 21 hours and 34 minutes to complete the primality test using LLR. Scott is a member of the Duke University team.

For more details, please see the official announcement.
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Profile ThomasProject donor
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Cullen LLR Bronze: Earned 10,000 credits (14,602)ESP LLR Bronze: Earned 10,000 credits (10,158)PPS LLR Bronze: Earned 10,000 credits (18,124)PSP LLR Bronze: Earned 10,000 credits (21,049)SoB LLR Bronze: Earned 10,000 credits (98,339)SR5 LLR Bronze: Earned 10,000 credits (12,188)SGS LLR Bronze: Earned 10,000 credits (62,305)TRP LLR Bronze: Earned 10,000 credits (17,022)PPS Sieve Turquoise: Earned 5,000,000 credits (5,137,404)
Message 73351 - Posted: 10 Feb 2014 | 6:53:48 UTC - in response to Message 73333.

Déjà vu ! Incredible ! Congratz Keishi !
Two mega primes in a row !
GG Scott for the doublecheck :)
Thanks Michael for the heads-up.
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Message boards : News : Deja Vu: World Record SR5 Discovery

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