AMDave
01-30-2012, 02:18 AM
World Record Generalized Cullen Prime
On 29 Jan 2012, 08:10:03 UTC, PrimeGrid’s PRPNet found the largest known generalized Cullen prime: 427194*113^427194+1 (http://primes.utm.edu/primes/page.php?id=104121)The prime is 877,069 digits long and enters Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 1st for generalized Cullen primes and 57th overall. The discovery was made by Ricky L. Hubbard of the United States using an AMD Phenom II X6 1090t @ 3.2GHz with 8GB RAM, running Windows 7. This computer took 7 hours and 15 minutes to complete the probable prime test using pfgw64 and 7 hours 20 minutes to complete the primality test again using pfgw64. Ricky is a member of the AMD Users (http://www.primegrid.com/team_display.php?teamid=14) Team.For more details, please see the official announcement (http://www.primegrid.com/download/gw113-427194.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=3999)
On 29 Jan 2012, 08:10:03 UTC, PrimeGrid’s PRPNet found the largest known generalized Cullen prime: 427194*113^427194+1 (http://primes.utm.edu/primes/page.php?id=104121)The prime is 877,069 digits long and enters Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes) ranked 1st for generalized Cullen primes and 57th overall. The discovery was made by Ricky L. Hubbard of the United States using an AMD Phenom II X6 1090t @ 3.2GHz with 8GB RAM, running Windows 7. This computer took 7 hours and 15 minutes to complete the probable prime test using pfgw64 and 7 hours 20 minutes to complete the primality test again using pfgw64. Ricky is a member of the AMD Users (http://www.primegrid.com/team_display.php?teamid=14) Team.For more details, please see the official announcement (http://www.primegrid.com/download/gw113-427194.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=3999)