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

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Exponent Range:










MnStatusDetails
3277093Factored
FactorDigitsBitsDate
134638215510802779304699928772016734110.12021-01-19 08:53:30
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)Stephen WoodAB8CAB18AE932E1A0
Verified (Factored)1999-06-15MSR CambridgeAB8CAB18AE932E1A2286446
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-01-21Chang Chia-TcheC6E8C36255D52C911133559153
P-1 factors
DateFactorB1B2
2021-01-19134638215510802779304699928772016740000000
History
DateUserTypeResult
2022-08-08JossNF-PM1
B1=3277093, B2=3303062070
2022-03-19JossNF-PM1
B1=1000000, B2=134316000
2021-01-21ANONYMOUSCERT
PRP Certification
Proof certified good
2021-01-21Chang Chia-TcheC-PRP
M3277093/1346382155108027793046999287720167 : C6E8C36255D52C91
PRP proof power = 7
PRP: Verified
Proof certified good
2021-01-19mikrF-PM1
Factor: 1346382155108027793046999287720167 / (P-1, B1=4000000)
2018-12-03TJAOINF
no factor from 2^67 to 2^68
2017-04-05Gordon SpenceNF
no factor from 2^66 to 2^67
2016-01-22JossNF-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=99172
2014-06-26-Anonymous-NF-PM1
B1=79586
2012-12-30dbaughNF
no factor from 2^62 to 2^63
2011-10-02Grant McCrackenNF
no factor from 2^61 to 2^62
2011-09-20USAFSSNF-PM1
B1=60000, B2=1065000, E=6
2009-07-09Carsten KossendeyNF-PM1
B1=15000, B2=191250
2009-04-03S485122NF
no factor from 2^60 to 2^61