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

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MnStatusDetails
1068701Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
6412207722.6old
14964806362811340.42008-07-16 09:30:55
1541915310620021393556470572787.02017-03-03 13:21:38
ECM
DigitsB1Curves
2550000280 / 280
30250000100 / 640
Estimated T-Level: 25.8
TF below 2^81 is very unlikely to find new factors due to ECM effort.
PRP
StatusDateUserResidueShiftTypeBase
Verified (Factored)2025-09-01KrieselAD91E4CFC3761B7A013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-05Oliver KruseFEED41A71E04F1343013
Verified2017-10-19kkmrkkblmbrbkFEED41A71E04F134354694113
History
DateUserTypeResult
2025-09-01Joanne GurneyCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-01KrieselC-PRP
AD91E4CFC3761B7A
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2024-08-21cramsey87NF-PM1
B1=3000000, B2=12490618140
2017-10-19kkmrkkblmbrbkC-PRP
M1068701/6412207/1496480636281/154191531062002139355647057 : FEED41A71E04F134
PRP: Verified
PRP without proof (not generated)
2017-10-05Oliver KruseC-PRP
M1068701/6412207/1496480636281/154191531062002139355647057 : FEED41A71E04F134
PRP: Verified
PRP without proof (not generated)
2017-09-28Oliver KruseC-PRP
M1068701/6412207/1496480636281/154191531062002139355647057 : FEED41A71E04F134
PRP without proof (not generated)
2017-03-03TJAOIF-ECM
Factor: 154191531062002139355647057 / (ECM curve 16, B1=50000, B2=5000000)
2008-07-16J FeitsmaF
Factor: 1496480636281