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

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MnStatusDetails
963163Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
4386298198849602082572168.62008-11-14 03:14:22
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.
LL
StatusDateUserResidueShift
Verified (Factored)Alex and Nick Myrman570C0
Verified (Factored)David Slowinski170C0
Verified (Factored)Ken Kriesel2AA6E3764EB9D70C0
Verified (Factored)2002-11-02Mark Outhier2AA6E3764EB9D70C557301
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-28Oliver KruseA584503F5F6604291013
Verified2017-10-16kkmrkkblmbrbkA584503F5F660429177020413
Verified2020-04-24Oliver Kruse17FF612961D0AAB516934753
Verified2025-05-27kkmrkkblmbrbk17FF612961D0AAB5171714653
History
DateUserTypeResult
2025-05-27Team_SchaubCERT
PRP Certification
Proof certified good
2025-05-27kkmrkkblmbrbkC-PRP
M963163/438629819884960208257 : 17FF612961D0AAB5
PRP proof power = 6
PRP: Verified
Proof certified good
2020-04-24Oliver KruseC-PRP
M963163/438629819884960208257 : 17FF612961D0AAB5
PRP: Verified
PRP without proof (small exponent)
2017-10-16kkmrkkblmbrbkC-PRP
M963163/438629819884960208257 : A584503F5F660429
PRP: Verified
PRP without proof (small exponent)
2017-09-28Oliver KruseC-PRP
M963163/438629819884960208257 : A584503F5F660429
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=200000, B2=5000000, E=6
2008-11-14Sturle SundeF-ECM
Factor: 438629819884960208257