Marin Mersenne 2^P-1
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MnStatusDetails
6940589Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
13011466775470451183734972580.12021-11-17 17:01:42
ECM
DigitsB1Curves
255000065 / 280
Estimated T-Level: 21.2 ⓘ
TF below 2^65 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1999-03-15Xiaohong Yang69993C89B4867E200
Verified (Factored)2002-01-02Fabrice Bellet69993C89B4867E203246702
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-11-22riccardo uberti957F22C12D1E9BC11161637953
P-1 factors
DateFactorB1B2
2021-11-17130114667754704511837349730000003000000
2021-12-02130114667754704511837349740000004000000
History
DateUserTypeResult
2021-12-02Seth_TrF-PM1
Factor: 1301146677547045118373497 / (P-1, B1=4000000)
2021-11-30riccardo ubertiNF-PP1
Start=6/5, B1=2000000, B2=40000000
2021-11-25riccardo ubertiNF-PP1
Start=2/7, B1=2000000, B2=40000000
2021-11-23riccardo ubertiNF-PM1
B1=4000000, B2=80000000
2021-11-22James HeinrichCERT
PRP Certification
Proof certified good
2021-11-22riccardo ubertiC-PRP
M6940589/1301146677547045118373497 : 957F22C12D1E9BC1
PRP proof power = 8
PRP: Verified
Proof certified good
2021-11-17Seth_TrF-PM1
Factor: 1301146677547045118373497 / (P-1, B1=3000000)
2021-09-28SRBaseNF
no factor from 2^71 to 2^72
2021-08-11SRBaseNF
no factor from 2^70 to 2^71
2021-07-28takahashiNF
no factor from 2^69 to 2^70
2020-04-24TJAOINF
no factor from 2^68 to 2^69
2018-02-27-Anonymous-NF
no factor from 2^67 to 2^68
2016-04-05Gordon SpenceNF
no factor from 2^66 to 2^67
2015-06-26VictordeHollanderNF
no factor from 2^65 to 2^66
2014-02-16lycornNF
no factor from 2^64 to 2^65
2014-02-09NesowaNF
no factor from 2^63 to 2^64
2011-04-22Carsten KossendeyNF-PM1
B1=440000, B2=13310000, E=12