Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
103940591Composite: 2 known prime factors
Factored
FactorDigitsBitsDate
207881183927.62007-09-18 23:11:07
434773098093911445.32007-09-18 23:11:07