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Message boards : News : PPS Mega Prime!

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Scott BrownProject donor
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Joined: 17 Oct 05
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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 (89,861,104)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 (148,157,445)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 (101,374,592)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 (241,094,106)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 (921,914,382)PSA Double Silver: Earned 200,000,000 credits (259,058,048)
Message 92153 - Posted: 17 Feb 2016 | 2:14:46 UTC

On 9 February 2016, 02:47:35 UTC, PrimeGrid’s PPS Mega Prime Search project found the Mega Prime:

275*2^3585539+1

The prime is 1,079,358 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 104th overall.

The discovery was made by Tyler Bredl (1998golfer) of the United States using an Intel(R) Xeon(R) CPU E5-2666 v3 @ 2.90GHz with 60GB RAM, running Linux. This computer took about 3 hour 3 minutes to complete the primality test using LLR. Tyler is a member of the Aggie The Pew team.

The prime was verified on 9 February 2016, 22:55:34 UTC, by Andreas Mueller (Andreas) of Germany using an Intel(R) Xeon(R) CPU E5620 @ 2.40GHz with 16GB RAM, running Linux. This computer took about 3 hours 51 minutes to complete the primality test using LLR.

For more details, please see the official announcement.

[CSF] Thomas H.V. DupontProject donor
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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 (711,568)GFN Amethyst: Earned 1,000,000 credits (1,639,126)PSA Ruby: Earned 2,000,000 credits (2,473,720)
Message 92166 - Posted: 17 Feb 2016 | 18:21:52 UTC - in response to Message 92153.
Last modified: 17 Feb 2016 | 18:22:36 UTC

Congratulations to Tyler and Andreas ! :)
Thanks Scott for the announcement.
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Profile Rick Reynolds
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Credit: 3,455,613,884
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Discovered 1 mega primeFound 2 primes in the 2018 Tour de Primes321 LLR Ruby: Earned 2,000,000 credits (2,148,880)Cullen LLR Ruby: Earned 2,000,000 credits (2,773,730)ESP LLR Ruby: Earned 2,000,000 credits (2,084,793)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (2,686,707)PPS LLR Jade: Earned 10,000,000 credits (11,171,386)PSP LLR Ruby: Earned 2,000,000 credits (2,010,187)SoB LLR Ruby: Earned 2,000,000 credits (2,798,257)SR5 LLR Jade: Earned 10,000,000 credits (11,169,992)SGS LLR Turquoise: Earned 5,000,000 credits (6,112,748)TRP LLR Turquoise: Earned 5,000,000 credits (5,110,887)Woodall LLR Ruby: Earned 2,000,000 credits (3,612,313)321 Sieve (suspended) Bronze: Earned 10,000 credits (54,591)Cullen/Woodall Sieve (suspended) Double Bronze: Earned 100,000,000 credits (127,922,665)Generalized Cullen/Woodall Sieve Jade: Earned 10,000,000 credits (12,289,620)PPS Sieve Double Amethyst: Earned 1,000,000,000 credits (1,655,954,320)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Turquoise: Earned 5,000,000 credits (8,134,964)TRP Sieve (suspended) Turquoise: Earned 5,000,000 credits (7,013,696)AP 26/27 Double Bronze: Earned 100,000,000 credits (105,829,568)GFN Double Bronze: Earned 100,000,000 credits (116,034,092)PSA Double Amethyst: Earned 1,000,000,000 credits (1,370,700,486)
Message 92167 - Posted: 17 Feb 2016 | 19:15:03 UTC

Great job G-man! And of course I am sure you will find many more.

Cheers Rick
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321 LLR Bronze: Earned 10,000 credits (17,273)PPS LLR Silver: Earned 100,000 credits (443,582)SR5 LLR Silver: Earned 100,000 credits (105,157)SGS LLR Silver: Earned 100,000 credits (100,862)TRP LLR Silver: Earned 100,000 credits (105,612)Generalized Cullen/Woodall Sieve Silver: Earned 100,000 credits (211,357)PPS Sieve Amethyst: Earned 1,000,000 credits (1,577,628)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Bronze: Earned 10,000 credits (34,269)TRP Sieve (suspended) Bronze: Earned 10,000 credits (32,679)AP 26/27 Silver: Earned 100,000 credits (113,204)GFN Silver: Earned 100,000 credits (366,072)PSA Silver: Earned 100,000 credits (127,825)
Message 92176 - Posted: 17 Feb 2016 | 21:32:00 UTC - in response to Message 92153.

Why do I feel like a Xeon is compulsory to find primes here...

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 Ruby: Earned 2,000,000 credits (2,063,182)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 (24,608,301)SR5 LLR Turquoise: Earned 5,000,000 credits (7,371,106)SGS LLR Ruby: Earned 2,000,000 credits (2,010,466)TRP LLR Ruby: Earned 2,000,000 credits (2,433,520)Woodall LLR Ruby: Earned 2,000,000 credits (2,158,053)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 (3,761,115)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 (7,086,053)GFN Emerald: Earned 50,000,000 credits (54,047,018)PSA Jade: Earned 10,000,000 credits (10,038,118)
Message 92177 - Posted: 17 Feb 2016 | 21:42:29 UTC - in response to Message 92176.

Why do I feel like a Xeon is compulsory to find primes here...


Because the grass is always greener on the other side.

There's two strategies to finding a prime: brute force, and dumb luck. Having both isn't a terrible thing. The more computing power you have, the more you're stacking the odds in your favor simply by virtue of being able to test more candidates. But having a data center full of servers doesn't guarantee you'll find a large prime. It's effective for finding lots of smaller primes, but the big ones will still need a lot of luck to find.

Then there are those people who find mega-primes on the 16th test they run...
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321 LLR Ruby: Earned 2,000,000 credits (4,586,111)Cullen LLR Ruby: Earned 2,000,000 credits (4,563,655)ESP LLR Ruby: Earned 2,000,000 credits (4,527,638)Generalized Cullen/Woodall LLR Ruby: Earned 2,000,000 credits (4,524,108)PPS LLR Ruby: Earned 2,000,000 credits (4,420,782)PSP LLR Ruby: Earned 2,000,000 credits (4,545,606)SoB LLR Ruby: Earned 2,000,000 credits (4,057,135)SR5 LLR Ruby: Earned 2,000,000 credits (4,527,346)SGS LLR Ruby: Earned 2,000,000 credits (4,288,749)TRP LLR Ruby: Earned 2,000,000 credits (4,608,089)Woodall LLR Ruby: Earned 2,000,000 credits (4,652,346)Generalized Cullen/Woodall Sieve Ruby: Earned 2,000,000 credits (4,259,337)PPS Sieve Turquoise: Earned 5,000,000 credits (5,214,937)Sierpinski (ESP/PSP/SoB) Sieve (suspended) Ruby: Earned 2,000,000 credits (2,000,053)TRP Sieve (suspended) Ruby: Earned 2,000,000 credits (2,030,160)AP 26/27 Ruby: Earned 2,000,000 credits (3,157,583)GFN Sapphire: Earned 20,000,000 credits (22,935,607)PSA Double Bronze: Earned 100,000,000 credits (133,979,980)
Message 92178 - Posted: 17 Feb 2016 | 22:11:14 UTC - in response to Message 92177.

But having a data center full of servers doesn't guarantee you'll find a large prime. It's effective for finding lots of smaller primes, but the big ones will still need a lot of luck to find.


Yeah, tell that to Prof. Curtis Cooper.....

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