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

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MnStatusDetails
1098133Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
3177359984871238.2old
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)2025-09-01Kriesel801A71FF6F61AAFD013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-29Oliver Kruse2A7C22309EA040591013
Verified2017-10-19kkmrkkblmbrbk2A7C22309EA04059152792013
History
DateUserTypeResult
2025-09-02Mike McCurdyCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-01KrieselC-PRP
801A71FF6F61AAFD
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2024-10-12timc995NF-PM1
B1=2000000, B2=147581083650
2017-10-19kkmrkkblmbrbkC-PRP
M1098133/317735998487 : 2A7C22309EA04059
PRP: Verified
PRP without proof (not generated)
2017-09-29Oliver KruseC-PRP
M1098133/317735998487 : 2A7C22309EA04059
PRP: Verified
PRP without proof (not generated)