AMDave
05-26-2013, 01:49 AM
World Record Fermat Divisor!
On 13 May 2013 12:41:57 UTC, PrimeGrid's Proth Prime Search project found a world record prime Fermat divisor:57*2^2747499+1 Divides F(2747497) (http://primes.utm.edu/primes/page.php?id=114144)The prime is 827,082 digits long and will enter Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 1st for prime Fermat divisors and 101st overall. Incidentally, it is also a new record for "weighted" prime Fermat divisors.The discovery was made by Marshall Bishop (Wintermute (http://www.primegrid.com/show_user.php?userid=106228)) of the United States using an AMD Quad-Core AMD Opteron(tm) Processor 2374 HE with 32 GB RAM running Linux. This computer took about 2 hours 28 minutes to complete the primality test using LLR.The prime was verified by [AF>Le_Pommier>MacGeneration.com] Sloughi (http://www.primegrid.com/show_user.php?userid=20650) of France using an Intel(R) Xeon(R) CPU E5645 @ 2.40GHz with 12 GB RAM running Mac OS X. This computer took about 4 hour and 46 minutes to complete the primality test using LLR. [AF>Le_Pommier>MacGeneration.com]Sloughi is a member of the L'Alliance Francophone (http://www.primegrid.com/team_display.php?teamid=37) team.For more details, please see the official announcement (http://www.primegrid.com/download/PPS-2747497.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=5048)
On 13 May 2013 12:41:57 UTC, PrimeGrid's Proth Prime Search project found a world record prime Fermat divisor:57*2^2747499+1 Divides F(2747497) (http://primes.utm.edu/primes/page.php?id=114144)The prime is 827,082 digits long and will enter Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 1st for prime Fermat divisors and 101st overall. Incidentally, it is also a new record for "weighted" prime Fermat divisors.The discovery was made by Marshall Bishop (Wintermute (http://www.primegrid.com/show_user.php?userid=106228)) of the United States using an AMD Quad-Core AMD Opteron(tm) Processor 2374 HE with 32 GB RAM running Linux. This computer took about 2 hours 28 minutes to complete the primality test using LLR.The prime was verified by [AF>Le_Pommier>MacGeneration.com] Sloughi (http://www.primegrid.com/show_user.php?userid=20650) of France using an Intel(R) Xeon(R) CPU E5645 @ 2.40GHz with 12 GB RAM running Mac OS X. This computer took about 4 hour and 46 minutes to complete the primality test using LLR. [AF>Le_Pommier>MacGeneration.com]Sloughi is a member of the L'Alliance Francophone (http://www.primegrid.com/team_display.php?teamid=37) team.For more details, please see the official announcement (http://www.primegrid.com/download/PPS-2747497.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=5048)