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
1095781Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
710066089929.4old
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)2025-09-01Kriesel71644D159C8444C1013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-29Oliver KruseAFDF4E1C3310FEF61013
Verified2017-10-16Oliver KruseAFDF4E1C3310FEF6169725113
Verified2017-12-31ATHAFDF4E1C3310FEF6125121513
History
DateUserTypeResult
2025-09-02Mike_2P-1CERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-01KrieselC-PRP
71644D159C8444C1
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2024-10-07timc995NF-PM1
B1=2000000, B2=63130867800
2017-12-31ATHC-PRP
M1095781/710066089 : AFDF4E1C3310FEF6
PRP: Verified
PRP without proof (not generated)
2017-10-16Oliver KruseC-PRP
M1095781/710066089 : AFDF4E1C3310FEF6
PRP: Verified
PRP without proof (not generated)
2017-09-29Oliver KruseC-PRP
M1095781/710066089 : AFDF4E1C3310FEF6
PRP: Verified
PRP without proof (not generated)