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
201972181Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
32315548971031.62007-12-09 20:20:57
History
DateUserTypeResult
2024-03-18James HeinrichF
Factor: 3231554897 / TF: 1-71