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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Exponent Range:










MnStatusDetails
3950267Factored
FactorDigitsBitsDate
365610754386992075533432375.02022-03-05 02:46:15
ECM
DigitsB1Curves
255000013 / 280
Estimated T-Level: 20.2
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Randy Roebuck0A5E3E837A214F3A0
Verified (Factored)2000-03-22Norb Raddatz0A5E3E837A214F3A2506245
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2022-03-11LaurV04B42CCB4DC33BE31389575453
History
DateUserTypeResult
2022-05-12JossNF-PM1
B1=500000, B2=113097600
2022-03-11Will EdgingtonCERT
PRP Certification
Proof certified good
2022-03-11LaurVC-PRP
M3950267/36561075438699207553343 : 04B42CCB4DC33BE3
PRP proof power = 7
PRP: Verified
Proof certified good
2022-03-05Samuel SchmidtF-ECM
Factor: 36561075438699207553343 / (ECM curve 1, B1=50000, B2=7000000, Sigma=8261018308966746)
2021-06-03-Anonymous-NF
no factor from 2^70 to 2^71
2021-05-03axnNF
no factor from 2^69 to 2^70
2020-11-28axnNF
no factor from 2^68 to 2^69
2019-01-07YxinityNF
no factor from 2^67 to 2^68
2017-07-20JossNF-PM1
B1=380160, B2=3801600, E=6
2016-12-11Gordon SpenceNF
no factor from 2^66 to 2^67
2016-05-04JossNF-PM1
B1=190080, B2=3421440, E=6
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-10ramgeisNF
no factor from 2^65 to 2^66
2015-01-18VictordeHollanderNF
no factor from 2^64 to 2^65
2015-01-18VictordeHollanderNF
no factor from 2^63 to 2^64
2014-11-17JossNF-PM1
B1=86248
2012-02-20GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-09-24Squeeky_SquirrelNF-PM1
B1=70000, B2=1190000, E=6
2011-03-24Grant McCrackenNF
no factor from 2^61 to 2^62
2009-08-02Carsten KossendeyNF-PM1
B1=20000, B2=285000
2009-01-05Architects CubedNF
no factor from 2^60 to 2^61