Free-DC
08-12-2014, 11:17 AM
On 25 July 2014, 8:47:48 UTC, PrimeGrid’s Mega Prime Search found a world record prime Fermat divisor: 193*2^3329782+1 Divides F(3329780) (http://primes.utm.edu/primes/page.php?id=118254) The prime is 1,002,367 digits long and enters Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 1st for prime Fermat divisors and 98th overall. It is also a new record for "weighted" prime Fermat divisors. The discovery was made by Raymond Ottusch (RaymondFO* (http://www.primegrid.com/show_user.php?userid=185653)) of the United States using an Intel Core i7-3930K CPU @ 3.20GHz with 12 GB RAM running Microsoft Windows 7 Professional. This computer took about 1 hour 11 minutes to complete the primality test using LLR. Raymond is a member of the Sicituradastra. (http://www.primegrid.com/team_display.php?teamid=1596) team. The prime was verified on 28 Jul 2014, 5:02:21 UTC by John Christy (John Christy (http://www.primegrid.com/show_user.php?userid=143201)) of the United States using an Intel Xeon CPU E31220 @ 3.10GHz with 8 GB RAM running Linux. This computer took about 1 hour and 24 minutes to complete the primality test using LLR. John is a member of the USA (http://www.primegrid.com/team_display.php?teamid=111) team. For more details, please see the official announcement (http://www.primegrid.com/download/mega-3329782.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=5849)
More... (http://www.primegrid.com/forum_thread.php?id=5849)