PrimeGrid: The Cinco de Mayo Challenge in 3^2 days

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In 3^2 days, come join us for the 5th day of the 5th month celebration. A 2^3 day Challenge is being offered on PrimeGrid's "The Riesel Problem" (LLR) application…ends on the 13th. That's a lot of prime numbers in the first 2 sentences. :) Let's continue the trend and find some primes during the Challenge. There remains 61 k's in The Riesel Problem for which no primes have been found. For more information, please see this forum post.

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Hold the Mayo.