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

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MnStatusDetails
1545647Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
18547764011030.8old
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)2025-09-02Kriesel964005C2669D355D013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-01Oliver Kruse223B729E1FFEF3811013
Verified2017-11-10kkmrkkblmbrbk223B729E1FFEF3811713213
History
DateUserTypeResult
2025-09-03JHGAlexVACERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
964005C2669D355D
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2017-11-10kkmrkkblmbrbkC-PRP
M1545647/1854776401 : 223B729E1FFEF381
PRP: Verified
PRP without proof (not generated)
2017-10-01Oliver KruseC-PRP
M1545647/1854776401 : 223B729E1FFEF381
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12