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02-22-15, 04:50 PM
On 13 February 2015 16:10:21 UTC, PrimeGrid's Proth Prime Search project found a prime Fermat divisor: 267*2^2662090+1 Divides F(2662088) (http://primes.utm.edu/primes/page.php?id=119333) The prime is 801,372 digits long and entered Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 3rd for prime Fermat divisors and 212th overall. The discovery was made by Jay Parangalan (stellarfirefly (http://www.primegrid.com/show_user.php?userid=139337)) of the United States using an Intel(R) Core(TM) i7-3930K CPU @ 3.20GHz with 32GB RAM running Microsoft Windows 7 Ultimate. This computer took about 2 hours 23 minutes to complete the primality test using LLR. The prime was verified on 14 February 2015 by user Lee (http://www.primegrid.com/show_user.php?userid=206688) of the United States using an Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz with 16GB RAM running Microsoft Windows 8.1 Professional. This computer took about 2 hours 1 minute to complete the primality test using LLR. For more details, please see the official announcement (http://www.primegrid.com/download/PPS-F2662088.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=6152)
More... (http://www.primegrid.com/forum_thread.php?id=6152)