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Message boards : News : March was a great month for the Extended Sierpinski Problem project

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Scott BrownProject donor
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Joined: 17 Oct 05
Posts: 1597
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Credit: 4,375,821,379
RAC: 5,958,065
Tour de Primes 2012Tour de Primes 2012Tour de Primes 2015Tour de Primes 2016321 LLR Emerald: Earned 50,000,000 credits (59,016,404)Cullen LLR Emerald: Earned 50,000,000 credits (52,200,386)ESP LLR Emerald: Earned 50,000,000 credits (55,811,408)Generalized Cullen/Woodall LLR Emerald: Earned 50,000,000 credits (56,429,081)PPS LLR Double Silver: Earned 200,000,000 credits (257,924,674)PSP LLR Emerald: Earned 50,000,000 credits (74,170,654)SoB LLR Emerald: Earned 50,000,000 credits (51,979,891)SR5 LLR Double Bronze: Earned 100,000,000 credits (105,171,537)SGS LLR Double Bronze: Earned 100,000,000 credits (141,212,728)TPS LLR (retired) Silver: Earned 100,000 credits (235,439)TRP LLR Emerald: Earned 50,000,000 credits (50,499,725)Woodall LLR Emerald: Earned 50,000,000 credits (53,544,674)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 Bronze: Earned 100,000,000 credits (101,946,511)PPS Sieve Double Amethyst: Earned 1,000,000,000 credits (1,935,494,240)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 (100,770,267)GFN Double Gold: Earned 500,000,000 credits (525,185,104)PSA Double Silver: Earned 200,000,000 credits (257,080,048)
Message 52940 - Posted: 11 Apr 2012 | 21:09:00 UTC

March was a special month for the Extended Sierpinski Problem (ESP) on PrimeGrid's PRPnet. After two years of crunching with no prime finds, two more k's were eliminated:

The first discovery was made by Timothy D. Winslow (Pooh Bear 27) of the United States on Wednesday 14th of March 2012. 123287*2^2538167+1 is prime and at 764070 digits entered Chris Caldwell's Top 5000 list as the 78th largest prime.

The second discovery was made by Rodger Ewing (Pilgrim) of the United States on Tuesday 27th of March 2012. 147559*2^2562218+1 is prime and at 771310 digits entered Chris Caldwell's Top 5000 list as the 77th largest prime.

15 k's now remain.

Congratulations to both Rodger and Tim! The next ESP find will very likely also be a Mega Prime!

For more information about the Extended Sierpinski Problem, see this forum post.
____________
141941*2^4299438-1 is prime!


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Message boards : News : March was a great month for the Extended Sierpinski Problem project

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