Marin Mersenne 2^P-1
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MnStatusDetails
3347909Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
2075758014026811264876052572787.42021-09-23 13:31:14
ECM
DigitsB1Curves
255000058 / 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)David Lambert91C86537889049410
Verified (Factored)1999-07-27Kyle Wheelan91C86537889049411015645
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-09-28ATHB4CE8D4CA1A20C89156989853
History
DateUserTypeResult
2022-04-08JossNF-PM1
B1=1000000, B2=115661700
2021-09-28metaphysisCERT
PRP Certification
Proof certified good
2021-09-28ATHC-PRP
M3347909/207575801402681126487605257 : B4CE8D4CA1A20C89
PRP proof power = 7
PRP: Verified
Proof certified good
2021-09-23daveward2005F-ECM
Factor: 207575801402681126487605257 / (ECM curve 6, B1=50000, B2=5000000, Sigma=5460154821441540)
2021-07-01TJAOINF
no factor from 2^68 to 2^69
2020-09-05mikrNF-PM1
B1=4000000, B2=150000000, E=12
2018-10-29TJAOINF
no factor from 2^67 to 2^68
2017-03-03Gordon SpenceNF
no factor from 2^66 to 2^67
2016-03-03ramgeisNF
no factor from 2^65 to 2^66
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-02-11VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-11VictordeHollanderNF
no factor from 2^63 to 2^64
2012-12-15Squeeky_SquirrelNF-PM1
B1=230000, B2=6670000, E=12
2012-11-15GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-10-10USAFSSNF-PM1
B1=55000, B2=907500, E=6
2011-08-23markrNF
no factor from 2^61 to 2^62
2009-07-05Carsten KossendeyNF-PM1
B1=15000, B2=206250
2009-03-29S485122NF
no factor from 2^60 to 2^61