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
221861153Composite: 1 known prime factor
Factored
FactorDigitsBitsDate
853537307275593909592066.22015-10-29 14:55:35
History
DateUserTypeResult
2015-10-29demfloroF
Factor: 85353730727559390959 / TF: 66-68
2013-08-26David CampeauNF
no factor from 2^65 to 2^66
2011-06-07carlos56NF
no factor from 2^64 to 2^65