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
207021953Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
2570409252867902639292167.82015-10-02 15:41:55
History
DateUserTypeResult
2015-10-02ConductorF
Factor: 257040925286790263929 / TF: 67-68
2015-09-26rob147147NF
no factor from 2^66 to 2^67
2013-08-05RichardNF
no factor from 2^65 to 2^66
2011-05-10sasaki3NF
no factor from 2^64 to 2^65