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

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MnStatusDetails
3709943Factored
FactorDigitsBitsDate
1632590226098832794349832477.12021-09-26 04:34:20
ECM
DigitsB1Curves
255000020 / 280
Estimated T-Level: 20.4
TF below 2^63 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Renato SeghieriC4498EFCD766059C0
Verified (Factored)2000-08-31Eric StrandC4498EFCD766059C1494250
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-09-26zr_zirconA6757746FC84B7661369559353
History
DateUserTypeResult
2022-05-24JossNF-PM1
B1=100000, B2=130364850
2022-03-04JossNF-PM1
B1=90000
2022-01-18JossNF
no factor from 2^67 to 2^68
2021-09-26MilwizzleCERT
PRP Certification
Proof certified good
2021-09-26zr_zirconC-PRP
M3709943/163259022609883279434983 : A6757746FC84B766
PRP proof power = 7
PRP: Verified
Proof certified good
2021-09-26daveward2005F-ECM
Factor: 163259022609883279434983 / (ECM curve 1, B1=50000, B2=5000000, Sigma=3488973286881245)
2021-05-05axnNF-PM1
B1=14000000, B2=700000000
2021-03-05axnNF
no factor from 2^69 to 2^70
2020-12-17axnNF
no factor from 2^68 to 2^69
2019-01-07TJAOINF
no factor from 2^67 to 2^68
2016-10-30Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-23ramgeisNF
no factor from 2^65 to 2^66
2015-10-19mikrNF-PM1
B1=1600000, B2=66000000, E=12
2015-01-20VictordeHollanderNF
no factor from 2^64 to 2^65
2015-01-20VictordeHollanderNF
no factor from 2^63 to 2^64
2012-04-19GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-04-15Grant McCrackenNF
no factor from 2^61 to 2^62
2010-09-12markrNF-PM1
B1=100000, B2=2150000, E=6
2009-03-07S485122NF
no factor from 2^60 to 2^61