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Diamond Member
PrimeGrid: Mega Prime found for The Riesel Problem (Déjà vu)
Remarkably, another mega prime has been found during the Cinco de Mayo Challenge.On 8 May 2011 15:43:27 UTC UTC, PrimeGrid’s The Riesel Problem project eliminated k=415267 by finding the mega prime: 415267*2^3771929-1The prime is 1,135,470 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 29th overall. This is the 2nd largest prime found in The Riesel Problem and PrimeGrid's fifth elimination. 59 k's now remain.The discovery was made by Alexey Tarasov (Alexus78) of the Ukraine using an Intel Core2 Duo E6550 @ 2.33GHz with 1 GB RAM running Windows XP Professional. This computer took just over 10 hours and 18 minutes to complete the primality test using LLR. Alexey is a member of the Ukraine team.For more details, please see the official announcement.
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