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
104780999Composite: 2 known prime factors
Factored
FactorDigitsBitsDate
209561999927.62007-09-19 10:17:00
748136332871136.12008-09-12 23:25:27