PrimeGrid's Challenge Series continues with the "Birthday/Summer Solstice Challenge". Come join us as we celebrate PrimeGrid's 5th birthday. A 5 day Challenge is being offered on The Riesel Problem ...
Come howl at the moon with us and "hunt" for Top 5000 primes. It's a GREAT opportunity for you to find one for yourself! Who knows, there may even be the rare Fermat number divisor. We hope to ...
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