Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
6947539Factored
FactorDigitsBitsDate
52427456835835385148412272.22023-11-26 05:20:48
ECM
DigitsB1Curves
25500006 / 280
Estimated T-Level: 20.1 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1999-05-16Richard Smith389F1BF8387D6F0F3920705
Verified (Factored)2001-10-06chris clark389F1BF8387D6F0F1834094
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-11-26Naegi Makoto15720DBB932EE2CA1194402753
P-1 factors
DateFactorB1B2
2023-11-26524274568358353851484142000004046614110
History
DateUserTypeResult
2023-11-26Will KCERT
PRP Certification
Proof certified good
2023-11-26Naegi MakotoC-PRP
M6947539/5242745683583538514841 : 15720DBB932EE2CA
PRP proof power = 8
PRP: Verified
Proof certified good
2023-11-26Sid & AndyF-PM1
Factor: 5242745683583538514841 / (P-1, B1=4200000, B2=4046614110)
2021-12-07Seth_TrNF-PM1
B1=2000000, B2=258849360
2021-09-26SRBaseNF
no factor from 2^71 to 2^72
2021-08-11SRBaseNF
no factor from 2^70 to 2^71
2021-07-28takahashiNF
no factor from 2^69 to 2^70
2020-04-10TJAOINF
no factor from 2^68 to 2^69
2020-01-20takahashiNF-PM1
B1=600000, B2=12000000, E=12
2018-02-26-Anonymous-NF
no factor from 2^67 to 2^68
2016-04-05Gordon SpenceNF
no factor from 2^66 to 2^67
2015-06-26VictordeHollanderNF
no factor from 2^65 to 2^66
2014-02-16lycornNF
no factor from 2^64 to 2^65
2014-02-09NesowaNF
no factor from 2^63 to 2^64
2011-12-12James HeinrichNF-PM1
B1=130000, B2=2827500, E=6