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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Exponent Range:










MnStatusDetails
6736771Factored
FactorDigitsBitsDate
1976615110222841627277772477.42023-09-06 11:45:26
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)1999-12-15ted ganchiff9255F8E9700BF6F50
Verified (Factored)2001-06-23David M. Haslam9255F8E9700BF6F54563137
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-09-07Naegi MakotoB1615D49BF51B5741514015253
P-1 factors
DateFactorB1B2
2023-09-06197661511022284162727777300000010145242800
History
DateUserTypeResult
2023-09-07JohnHa0CERT
PRP Certification
Proof certified good
2023-09-07Naegi MakotoC-PRP
M6736771/197661511022284162727777 : B1615D49BF51B574
PRP proof power = 8
PRP: Verified
Proof certified good
2023-09-06Naegi MakotoF-PM1
Factor: 197661511022284162727777 / (P-1, B1=3000000, B2=10145242800)
2022-09-25takahashiNF
no factor from 2^71 to 2^72
2021-02-16-Anonymous-NF
no factor from 2^70 to 2^71
2021-02-16-Anonymous-NF
no factor from 2^69 to 2^70
2020-10-26takahashiNF-PM1
B1=1000000, B2=23000000, E=12
2020-05-08TJAOINF
no factor from 2^68 to 2^69
2019-03-25takahashiNF-PM1
B1=250000, B2=4400000, E=6
2018-02-27-Anonymous-NF
no factor from 2^67 to 2^68
2016-05-02Gordon SpenceNF
no factor from 2^66 to 2^67
2015-11-12snme2pm1NF
no factor from 2^65 to 2^66
2014-07-03lycornNF
no factor from 2^64 to 2^65
2014-06-29NesowaNF
no factor from 2^63 to 2^64
2012-07-08NesowaNF-PM1
B1=80000, B2=1440000, E=6