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Message boards : News : SR5 Mega Prime - PrimeGrid's 100th MEGA Prime Find!!!

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Scott BrownProject donor
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Joined: 17 Oct 05
Posts: 1769
ID: 1178
Credit: 5,531,796,388
RAC: 2,160,077
Discovered the World's First base 116 Generalized Cullen prime!!!Discovered 12 mega primesEliminated 6 conjecture "k"sDiscovered 1 Sophie Germain pairDiscovered 1 Fermat divisor2012 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 Stage321 LLR Double Bronze: Earned 100,000,000 credits (100,829,118)Cullen LLR Double Bronze: Earned 100,000,000 credits (103,870,990)ESP LLR Double Bronze: Earned 100,000,000 credits (103,603,483)Generalized Cullen/Woodall LLR Double Bronze: Earned 100,000,000 credits (102,075,655)PPS LLR Double Silver: Earned 200,000,000 credits (303,052,366)PSP LLR Emerald: Earned 50,000,000 credits (88,692,247)SoB LLR Double Bronze: Earned 100,000,000 credits (116,841,417)SR5 LLR Double Bronze: Earned 100,000,000 credits (129,423,098)SGS LLR Double Bronze: Earned 100,000,000 credits (148,139,564)TPS LLR (retired) Silver: Earned 100,000 credits (235,439)TRP LLR Double Bronze: Earned 100,000,000 credits (109,149,031)Woodall LLR Double Bronze: Earned 100,000,000 credits (101,356,263)321 Sieve (suspended) Turquoise: Earned 5,000,000 credits (8,322,150)Cullen/Woodall Sieve (suspended) Emerald: Earned 50,000,000 credits (83,794,448)Generalized Cullen/Woodall Sieve Double Silver: Earned 200,000,000 credits (240,468,300)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (2,105,665,691)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 Bronze: Earned 100,000,000 credits (119,533,830)GFN Double Gold: Earned 500,000,000 credits (902,983,417)PSA Double Silver: Earned 200,000,000 credits (259,058,048)
Message 95516 - Posted: 5 Jun 2016 | 17:58:41 UTC

On 30 May 2016, 18:15:42 UTC, PrimeGrid’s Sierpinski/Riesel Base 5 Problem project eliminated k=53546 by finding the mega prime:

53546*5^2216664-1

The prime is 1,549,387 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 48th overall. This is the largest known base 5 mega prime. 75 k's now remain in the Riesel Base 5 Problem.

The discovery was made by Tom Greer (tng*) of the United States using an Intel(R) Xeon(R) CPU E5-2620 0 @ 2.00GHz with 32GB RAM running Microsoft Windows 7 Professional. This computer took about 29 hours 24 minutes to complete the primality test using LLR. Tom is a member of the Sicituradastra. team.

The prime was verified on 2 June 2016, 01:20:10 UTC by John Parker (Mike Parker) of the United States using an Intel(R) Core(TM) i7-5820K CPU @ 3.30GHz with 16GB RAM running Microsoft Windows 10. This computer took about 80 hours 8 minutes to complete the primality test using LLR. John is a member of the SETI.USA team.

For more details, please see the official announcement.

Scott BrownProject donor
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Project scientist
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Joined: 17 Oct 05
Posts: 1769
ID: 1178
Credit: 5,531,796,388
RAC: 2,160,077
Discovered the World's First base 116 Generalized Cullen prime!!!Discovered 12 mega primesEliminated 6 conjecture "k"sDiscovered 1 Sophie Germain pairDiscovered 1 Fermat divisor2012 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 Stage321 LLR Double Bronze: Earned 100,000,000 credits (100,829,118)Cullen LLR Double Bronze: Earned 100,000,000 credits (103,870,990)ESP LLR Double Bronze: Earned 100,000,000 credits (103,603,483)Generalized Cullen/Woodall LLR Double Bronze: Earned 100,000,000 credits (102,075,655)PPS LLR Double Silver: Earned 200,000,000 credits (303,052,366)PSP LLR Emerald: Earned 50,000,000 credits (88,692,247)SoB LLR Double Bronze: Earned 100,000,000 credits (116,841,417)SR5 LLR Double Bronze: Earned 100,000,000 credits (129,423,098)SGS LLR Double Bronze: Earned 100,000,000 credits (148,139,564)TPS LLR (retired) Silver: Earned 100,000 credits (235,439)TRP LLR Double Bronze: Earned 100,000,000 credits (109,149,031)Woodall LLR Double Bronze: Earned 100,000,000 credits (101,356,263)321 Sieve (suspended) Turquoise: Earned 5,000,000 credits (8,322,150)Cullen/Woodall Sieve (suspended) Emerald: Earned 50,000,000 credits (83,794,448)Generalized Cullen/Woodall Sieve Double Silver: Earned 200,000,000 credits (240,468,300)PPS Sieve Double Ruby: Earned 2,000,000,000 credits (2,105,665,691)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 Bronze: Earned 100,000,000 credits (119,533,830)GFN Double Gold: Earned 500,000,000 credits (902,983,417)PSA Double Silver: Earned 200,000,000 credits (259,058,048)
Message 95517 - Posted: 5 Jun 2016 | 18:01:23 UTC

As noted in the thread title, this is PrimeGrid's 100th find of a million-digit or larger prime number (a mega prime). For more information about this milestone, see this thread.

For a complete listing of PrimeGrid's mega prime finds, see here.

Profile Mike Parker
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Joined: 30 Jul 07
Posts: 11
ID: 10331
Credit: 151,265,085
RAC: 59,301
321 LLR Turquoise: Earned 5,000,000 credits (6,814,966)Cullen LLR Ruby: Earned 2,000,000 credits (2,693,829)ESP LLR Silver: Earned 100,000 credits (461,915)Generalized Cullen/Woodall LLR Amethyst: Earned 1,000,000 credits (1,875,917)PPS LLR Ruby: Earned 2,000,000 credits (4,794,708)PSP LLR Ruby: Earned 2,000,000 credits (2,154,120)SoB LLR Amethyst: Earned 1,000,000 credits (1,304,426)SR5 LLR Amethyst: Earned 1,000,000 credits (1,654,406)SGS LLR Bronze: Earned 10,000 credits (95,675)TRP LLR Amethyst: Earned 1,000,000 credits (1,002,183)Woodall LLR Ruby: Earned 2,000,000 credits (4,070,791)321 Sieve (suspended) Bronze: Earned 10,000 credits (68,754)Cullen/Woodall Sieve (suspended) Silver: Earned 100,000 credits (101,010)PPS Sieve Emerald: Earned 50,000,000 credits (71,160,125)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Bronze: Earned 10,000 credits (20,015)TRP Sieve (suspended) Bronze: Earned 10,000 credits (33,260)AP 26/27 Sapphire: Earned 20,000,000 credits (31,948,103)GFN Sapphire: Earned 20,000,000 credits (21,007,550)
Message 95568 - Posted: 7 Jun 2016 | 6:53:27 UTC

Even as the double checker, I'm honored to catch a Mega.
____________

[CSF] Thomas H.V. DupontProject donor
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Joined: 22 Jan 16
Posts: 427
ID: 436840
Credit: 23,612,465
RAC: 11,098
321 LLR Bronze: Earned 10,000 credits (18,114)Cullen LLR Bronze: Earned 10,000 credits (34,704)ESP LLR Bronze: Earned 10,000 credits (26,640)Generalized Cullen/Woodall LLR Bronze: Earned 10,000 credits (15,312)PPS LLR Bronze: Earned 10,000 credits (78,903)SoB LLR Silver: Earned 100,000 credits (121,578)SR5 LLR Bronze: Earned 10,000 credits (25,295)SGS LLR Gold: Earned 500,000 credits (507,221)Generalized Cullen/Woodall Sieve Silver: Earned 100,000 credits (113,599)PPS Sieve Jade: Earned 10,000,000 credits (17,893,268)TRP Sieve (suspended) Bronze: Earned 10,000 credits (26,191)AP 26/27 Gold: Earned 500,000 credits (638,794)GFN Amethyst: Earned 1,000,000 credits (1,639,126)PSA Ruby: Earned 2,000,000 credits (2,473,720)
Message 95584 - Posted: 7 Jun 2016 | 15:53:04 UTC - in response to Message 95516.

Congratulations to Tom and John!
Thanks Scott for the announcement :)
____________
Founder of CRUNCHERS SANS FRONTIERES
www.crunchersansfrontieres.org
CSF lucky number 22872882^65536+1

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Message boards : News : SR5 Mega Prime - PrimeGrid's 100th MEGA Prime Find!!!

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