Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
5066239Factored
FactorDigitsBitsDate
19644164736988800127314869212890.72021-11-08 01:59:27
ECM
DigitsB1Curves
255000045 / 280
Estimated T-Level: 20.8 ⓘ
TF below 2^64 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Bad1998-08-09Rob McClainEA9CA14938811DB70
Verified (Factored)2000-07-03Glenn LangfordE6154D9B5AAE97C63489706
Verified (Factored)2001-06-17Paul GraysonE6154D9B5AAE97C63898874
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-11-08ATHAC3C501285D48B5D134936853
History
DateUserTypeResult
2021-11-08Simon JosefssonCERT
PRP Certification
Proof certified good
2021-11-08ATHC-PRP
M5066239/1964416473698880012731486921 : AC3C501285D48B5D
PRP proof power = 7
PRP: Verified
Proof certified good
2021-11-08ATHF-PP1
Start=2/7, B1=2500000, B2=90000000, Factor: 1964416473698880012731486921
2021-04-03-Anonymous-NF
no factor from 2^71 to 2^72
2021-04-01-Anonymous-NF
no factor from 2^70 to 2^71
2021-04-01-Anonymous-NF
no factor from 2^69 to 2^70
2021-01-25TJAOINF
no factor from 2^68 to 2^69
2018-06-11ramgeisNF
no factor from 2^67 to 2^68
2017-07-03mikrNF-PM1
B1=1500000, B2=45000000, E=12
2016-05-22Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-08-02snme2pm1NF
no factor from 2^65 to 2^66
2014-12-14VictordeHollanderNF
no factor from 2^64 to 2^65
2014-12-14VictordeHollanderNF
no factor from 2^63 to 2^64
2009-08-12USAFSSNF-PM1
B1=60000, B2=1065000, E=6
2009-08-08GrunwalderGIMPNF
no factor from 2^1 to 2^63
2008-12-28Sturle SundeNF
no factor from 2^61 to 2^62