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06-30-13, 11:45 PM
On 18 June 2013 16:51:36 UTC, PrimeGrid's Proth Prime Search project found a prime Fermat divisor:2145*2^1099064+1 Divides F(1099061) (http://primes.utm.edu/primes/page.php?id=114458)The prime is 330,855 digits long and entered Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 10th for prime Fermat divisors and 2629th overall. The discovery was made by Sai Yik Tang (tomakey (http://www.primegrid.com/show_user.php?userid=42037)) of Malaysia using an Intel(R) Core(TM) i5-2400 CPU @ 3.10GHz with 4GB RAM running Microsoft Windows 7 Enterprise. This computer took about 8 minutes to complete the primality test using LLR.The prime was verified on 21 June 2013 1:43:48 UTC by Timothy Hitch (Tim (http://www.primegrid.com/show_user.php?userid=105722)) using an Intel(R) Core(TM)2 Duo CPU T8300 @ 2.40GHz with 4 GB RAM running Microsoft Windows 7 Ultimate. This computer took about 33 minutes to complete the primality test using LLR.For more details, please see the official announcement (http://www.primegrid.com/download/PPS-F1099061.pdf).
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More... (http://www.primegrid.com/forum_thread.php?id=5151)