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

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MnStatusDetails
1085153Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
24741488411031.2old
53121429699831342.32008-07-16 09:31:09
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)2025-09-01Kriesel3D9EE0CFE21DC030013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-29Oliver Kruse19344C30ABDF7F932013
Verified2017-10-18kkmrkkblmbrbk19344C30ABDF7F93216597613
History
DateUserTypeResult
2025-09-01rushynCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-01KrieselC-PRP
3D9EE0CFE21DC030
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2024-10-04timc995NF-PM1
B1=2000000, B2=63130867800
2017-10-18kkmrkkblmbrbkC-PRP
M1085153/2474148841/5312142969983 : 19344C30ABDF7F93
PRP: Verified
PRP without proof (not generated)
2017-09-29Oliver KruseC-PRP
M1085153/2474148841/5312142969983 : 19344C30ABDF7F93
PRP: Verified
PRP without proof (not generated)
2008-07-16J FeitsmaF
Factor: 5312142969983