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04-22-12, 09:12 PM
On 19 Apr 2012, 21:12:27 UTC, PrimeGrid’s Generalized Fermat Prime Search, through PRPNet, found the mega prime:773620^262144+1 (http://primes.utm.edu/primes/page.php?id=106465)The prime is 1,543,643 digits long and enters Chris Caldwell's “The Largest Known Primes Database (http://(http://primes.utm.edu/primes))” ranked 2nd for Generalized Fermat primes (http://primes.utm.edu/top20/page.php?id=12) and 22nd overall.The discovery was made by Senji Yamashita of Japan using an NVIDIA GeForce GTX 580 in an Intel Core i7-970 @ 3.20GHz system with 6GB RAM, running Windows 7 Professional x64. This GPU took about 47 minutes to probable prime (PRP) test with GenefCUDA. Senji is a member of the PrimeSearchTeam (http://www.primegrid.com/team_display.php?teamid=696).For more details, please see the official announcement (http://www.primegrid.com/download/gfn-773620_262144.pdf).

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