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

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MnStatusDetails
1804549Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
5562323792110011549.0old
ECM
DigitsB1Curves
2550000280 / 280
30250000105 / 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)2025-09-02Kriesel5F257E35DD9AD56D013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-03Oliver KruseDB9236AAF4B58BA91013
Verified2017-11-05kkmrkkblmbrbkDB9236AAF4B58BA9134941213
History
DateUserTypeResult
2025-09-03AsrielCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
5F257E35DD9AD56D
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2017-11-05kkmrkkblmbrbkC-PRP
M1804549/556232379211001 : DB9236AAF4B58BA9
PRP: Verified
PRP without proof (not generated)
2017-10-03Oliver KruseC-PRP
M1804549/556232379211001 : DB9236AAF4B58BA9
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12