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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
1940971Factored
FactorDigitsBitsDate
31560188471031.6old
81520782011032.92008-07-15 07:48:28
9706943523615431549.82008-08-26 20:20:20
6073482330790687911859.12015-10-23 11:16:01
8106123196743074621992169.52020-11-02 23:04:54
ECM
DigitsB1Curves
2550000275 / 280
Estimated T-Level: 24.9
TF below 2^78 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-30alpertron4CAC71268CFC4F6C4013
Verified (Factored)2017-10-20Oliver Kruse4CAC71268CFC4F6C491707613
Verified2020-11-05fre_games6A48C96ED1737BC85161327753
Verified2020-11-06kutens6A48C96ED1737BC85126572953
History
DateUserTypeResult
2020-11-06C.D.B.CERT
PRP Certification
Proof certified good
2020-11-06kutensC-PRP
M1940971/3156018847/8152078201/970694352361543/607348233079068791/810612319674307462199 : 6A48C96ED1737BC8
PRP proof power = 7
PRP: Verified
Proof certified good
2020-11-05fre_gamesC-PRP
M1940971/3156018847/8152078201/970694352361543/607348233079068791/810612319674307462199 : 6A48C96ED1737BC8
PRP: Verified
PRP without proof (not generated)
2020-11-02nordiF-ECM
Factor: 810612319674307462199 / (ECM curve 5, B1=50000, B2=5000000, Sigma=3572922006607407)
2017-10-20Oliver KruseC-PRP
M1940971/3156018847/8152078201/970694352361543/607348233079068791 : 4CAC71268CFC4F6C
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M1940971/3156018847/607348233079068791/8152078201/970694352361543 : 4CAC71268CFC4F6C
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12
2015-10-23TJAOIF
Factor: 607348233079068791 / TF: 59-60
2008-08-26-Anonymous-F
Factor: 970694352361543
2008-07-15J FeitsmaF
Factor: 8152078201