Free-DC
05-12-2010, 12:26 PM
On 20 Apr 2009 0:52:45 UTC, PrimeGrid's Cullen Prime Search found a World Record Cullen Mega Prime: 6328548*26328548+1 The prime is PrimeGrid's largest prime to date. It is 1,905,090 digits long and enters Chris Caldwell's The Largest Known Primes Database (http://primes.utm.edu/primes/) ranked 14th overall. It is the largest Cullen prime found and the largest found Mega Prime using LLR. The discovery was made by Dennis R. Gesker (Gesker (http://www.primegrid.com/show_user.php?userid=13207)) of the United States using an Intel Xeon E5420 @ 2.50GHz with 8GB RAM running Windows Server 2008. This computer took 32 hours 28 minutes to complete the primality test. For more details, please see the official announcement (http://www.primegrid.com/download/Cullen6328548.pdf). Decimal representation of the number is also available (http://www.primegrid.com/download/cn6328548.pdf).
More... (http://www.primegrid.com/forum_thread.php?id=2441)
More... (http://www.primegrid.com/forum_thread.php?id=2441)