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
1804507Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
372738965931135.1old
3255763709691238.22008-07-15 07:46:49
ECM
DigitsB1Curves
2550000280 / 280
30250000107 / 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)2025-09-02KrieselBDC41E0E747FD5D0013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-10-03Oliver KruseD2E7EDE07B0BD1CE2013
Verified2017-11-05ATHD2E7EDE07B0BD1CE278920613
History
DateUserTypeResult
2025-09-03ikeCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
BDC41E0E747FD5D0
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2017-11-05ATHC-PRP
M1804507/37273896593/325576370969 : D2E7EDE07B0BD1CE
PRP: Verified
PRP without proof (not generated)
2017-10-03Oliver KruseC-PRP
M1804507/37273896593/325576370969 : D2E7EDE07B0BD1CE
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12
2008-07-15J FeitsmaF
Factor: 325576370969