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
208530227Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
1271583962516780382312166.82015-10-11 09:55:06
History
DateUserTypeResult
2015-10-11demfloroF
Factor: 127158396251678038231 / TF: 66-68
2013-08-07Luigi R.NF
no factor from 2^65 to 2^66
2011-05-13tscNF
no factor from 2^64 to 2^65