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
204387817Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
1960370466227682562872167.42015-10-06 09:55:06
History
DateUserTypeResult
2015-10-06demfloroF
Factor: 196037046622768256287 / TF: 66-68
2013-07-25-Anonymous-NF
no factor from 2^65 to 2^66
2011-05-06Damian SilvestreNF
no factor from 2^64 to 2^65