Marin Mersenne 2^P-1
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MnStatusDetails
3271993Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
37851276531965856430401482252175133108.22023-06-11 00:35:23
ECM
DigitsB1Curves
2550000101 / 280
Estimated T-Level: 21.8 ⓘ
TF below 2^67 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
BadMassimo Muolo573F8D5029F185640
Verified (Factored)George WoltmanF584FF56E3CD08D01877779
Verified (Factored)1999-06-26Daniel BorgesF584FF56E3CD08D0789397
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-06-11Naegi Makoto4400E3344014629E1112415253
P-1 factors
DateFactorB1B2
2023-06-11378512765319658564304014822521751850000021768755190
History
DateUserTypeResult
2023-06-11Mikhail IvanovCERT
PRP Certification
Proof certified good
2023-06-11Naegi MakotoC-PRP
M3271993/378512765319658564304014822521751 : 4400E3344014629E
PRP proof power = 7
PRP: Verified
Proof certified good
2023-06-11Sid & AndyF-PM1
Factor: 378512765319658564304014822521751 / (P-1, B1=8500000, B2=21768755190)
2023-05-29JossNF-PM1
B1=1000000, B2=2236514280
2022-05-04TJAOINF
no factor from 2^69 to 2^70
2021-06-07TJAOINF
no factor from 2^68 to 2^69
2020-12-14mikrNF-PM1
B1=4000000, B2=150000000, E=12
2018-12-10TJAOINF
no factor from 2^67 to 2^68
2017-04-04Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2016-01-16JossNF-PM1
B1=383400, B2=3834000, E=6
2015-06-28ThaNF
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
2014-10-10JossNF-PM1
B1=99232
2014-06-26-Anonymous-NF-PM1
B1=79616
2012-12-30dbaughNF
no factor from 2^62 to 2^63
2011-12-15Sid & AndyNF
no factor from 2^61 to 2^62
2011-09-18USAFSSNF-PM1
B1=60000, B2=1065000, E=6
2009-07-08Carsten KossendeyNF-PM1
B1=15000, B2=191250
2009-04-03S485122NF
no factor from 2^60 to 2^61