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
1076401Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
6458407722.6old
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)2025-09-01Kriesel0A1A9CBEFC29D2DA013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-28Oliver Kruse336D95B58508423D1013
Verified2017-10-18kkmrkkblmbrbk336D95B58508423D142181413
History
DateUserTypeResult
2025-09-01David BarinaCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-01KrieselC-PRP
0A1A9CBEFC29D2DA
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2024-08-22cramsey87NF-PM1
B1=3000000, B2=22221719520
2017-10-18kkmrkkblmbrbkC-PRP
M1076401/6458407 : 336D95B58508423D
PRP: Verified
PRP without proof (not generated)
2017-09-28Oliver KruseC-PRP
M1076401/6458407 : 336D95B58508423D
PRP: Verified
PRP without proof (not generated)