Marin Mersenne 2^P-1
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Finding World Record Primes Since 1996

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MnStatusDetails
3490789Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
26716830966975963741611772581.12021-04-12 10:42:59
ECM
DigitsB1Curves
255000015 / 280
Estimated T-Level: 20.3 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Joel ArmengaudB44BC67978981A6A0
Verified (Factored)1999-07-04Bill BrandtB44BC67978981A6A2496817
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-04-15Joe S.2DE86A023F3A640D1212892353
P-1 factors
DateFactorB1B2
2021-04-12267168309669759637416117714000000700000000
History
DateUserTypeResult
2022-04-10JossNF-PM1
B1=1000000, B2=126668850
2021-04-15curtiscCERT
PRP Certification
Proof certified good
2021-04-15Joe S.C-PRP
M3490789/2671683096697596374161177 : 2DE86A023F3A640D
PRP proof power = 7
PRP: Verified
Proof certified good
2021-04-12axnF-PM1
Factor: 2671683096697596374161177 / (P-1, B1=14000000, B2=700000000)
2021-01-12axnNF
no factor from 2^68 to 2^69
2018-08-27TJAOINF
no factor from 2^67 to 2^68
2017-02-20Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-01-06ramgeisNF
no factor from 2^65 to 2^66
2015-02-07VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-07VictordeHollanderNF
no factor from 2^63 to 2^64
2014-09-07HBendtzNF-PM1
B1=615000, B2=12000000, e=12
2014-08-21JossNF-PM1
B1=78387
2012-08-18GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-11-16USAFSSNF-PM1
B1=60000, B2=990000, E=6
2011-07-31markrNF
no factor to 2^62
2009-07-08Carsten KossendeyNF-PM1
B1=20000, B2=240000
2009-03-19S485122NF
no factor from 2^60 to 2^61