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Scott Brown Volunteer moderator Project administrator Volunteer tester Project scientist
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Joined: 17 Oct 05 Posts: 1950 ID: 1178 Credit: 6,604,724,692 RAC: 2,796,547
                                  
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On 15 Jun 2012, 9:27:36 UTC, PrimeGrid’s Generalized Fermat Prime Search found the largest known Generalized Fermat mega prime: 341112^524288+1
The prime is 2,900,832 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 1st for Generalized Fermat primes and 11th overall.
The discovery was made by Peyton Hayslette (Peyton Hayslette) of the United States using an NVIDIA GeForce GTX 560 Ti in an Intel Core i5-2500K @ 3.30GHz system with 16GB RAM, running 64 bit Windows 7 Ultimate. This GPU took 3 hours 48 minutes to probable prime (PRP) test with GeneferCUDA. Peyton is a member of the North Carolina team.
The prime was verified by Rob Bosma (Cow_tipping) of the Netherlands using an NVIDIA GeForce GTX 580 in an Intel Core i7 920 @ 2.67GHz with 16GB RAM, running 64 bit Windows 7 Ultimate. This GPU took 2 hours 26 minutes to probable prime (PRP) test with GeneferCUDA. Rob is a member of the Dutch Power Cows team.
For more details, please see the official announcement.
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Great result! And congratulations to the cows on their double-check
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Twitter: IainBethune
Proud member of team "Aggie The Pew". Go Aggie!
3073428256125*2^1290000-1 is Prime! |
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Thanks!
It was my pleasure. :) |
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Michael Goetz Volunteer moderator Project administrator Project scientist
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Joined: 21 Jan 10 Posts: 13049 ID: 53948 Credit: 203,056,933 RAC: 85,614
                        
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From #14 to #11 (or #2 to #1):
CONGRATULATIONS!!!
I've been wondering how it would feel when someone eventually broke my record. Now I know. It feels great! You broke the record by about 400,000 digits, too. Fantastic!
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Please do not PM me with support questions. Ask on the forums instead. Thank you!
My lucky number is 75898524288+1 |
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This is a beyond wonderful result! Thank you Cow_tipping for the verification! |
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And you Peyton for the opportunity. :D |
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It looks like a new World Record GFN Prime is found! The subproject status page shows 3 primes now for n=524288. |
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Michael Goetz Volunteer moderator Project administrator Project scientist
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Joined: 21 Jan 10 Posts: 13049 ID: 53948 Credit: 203,056,933 RAC: 85,614
                        
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It looks like a new World Record GFN Prime is found! The subproject status page shows 3 primes now for n=524288.
Yes, it looks like yet another GFN524288 prime has been found!
EDIT: At this point, it's still only a probable prime. Further testing (with LLR or PFGW) will be done at PrimeGrid to prove the number is prime. That will take a few days.
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Please do not PM me with support questions. Ask on the forums instead. Thank you!
My lucky number is 75898524288+1 |
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Wow - we really have struck a rich seam of GFNs at the moment.
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Twitter: IainBethune
Proud member of team "Aggie The Pew". Go Aggie!
3073428256125*2^1290000-1 is Prime! |
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