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
1071349Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
458965911611135.4old
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)2025-09-01Kriesel62B28121707A977B013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-28Oliver KruseCD38EA2EE1633F361013
Verified2017-10-16Oliver KruseCD38EA2EE1633F3614763413
Verified2018-01-01ATHCD38EA2EE1633F36175650913
History
DateUserTypeResult
2025-09-01ChuckCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-01KrieselC-PRP
62B28121707A977B
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2024-08-20cramsey87NF-PM1
B1=7000000, B2=44808781290
2018-01-01ATHC-PRP
M1071349/45896591161 : CD38EA2EE1633F36
PRP: Verified
PRP without proof (not generated)
2017-10-16Oliver KruseC-PRP
M1071349/45896591161 : CD38EA2EE1633F36
PRP: Verified
PRP without proof (not generated)
2017-09-28Oliver KruseC-PRP
M1071349/45896591161 : CD38EA2EE1633F36
PRP: Verified
PRP without proof (not generated)