Marin Mersenne 2^P-1
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MnStatusDetails
3976439Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
64524428078237311787900574232892.42024-01-09 06:46:55
ECM
DigitsB1Curves
255000057 / 280
Estimated T-Level: 21.0 ⓘ
TF below 2^65 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1998-11-28John MacPhersonFA05A47132A50C1F0
Verified (Factored)1999-10-29John AbercrombieFA05A47132A50C1F306937
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2024-01-09Naegi MakotoEABEAF8C0BE20245183296353
History
DateUserTypeResult
2024-01-10curtiscCERT
PRP Certification
Proof certified good
2024-01-09Naegi MakotoC-PRP
M3976439/6452442807823731178790057423 : EABEAF8C0BE20245
PRP proof power = 7
PRP: Verified
Proof certified good
2024-01-09daveward2005F-ECM
Factor: 6452442807823731178790057423 / (ECM curve 16, B1=50678, B2=5067800, Sigma=2302728832962931)
2022-04-18KingNF-PM1
B1=5000000, B2=2005315410
2021-06-03-Anonymous-NF
no factor from 2^70 to 2^71
2021-05-13axnNF
no factor from 2^69 to 2^70
2020-04-24TJAOINF
no factor from 2^68 to 2^69
2018-12-29YxinityNF
no factor from 2^67 to 2^68
2016-12-15Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-04ramgeisNF
no factor from 2^65 to 2^66
2013-10-22David CampeauNF
no factor from 2^64 to 2^65
2013-07-03JayderNF
no factor from 2^63 to 2^64
2012-02-20GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-04-29markrNF
no factor from 2^61 to 2^62
2011-04-28Carsten KossendeyNF-PM1
B1=265000, B2=7618750, E=12
2009-07-27Carsten KossendeyNF-PM1
B1=20000, B2=290000