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

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MnStatusDetails
895571Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
345690407928.4old
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 Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-28Oliver Kruse30656E0B06D1CD1F1013
Verified2017-10-14Oliver Kruse30656E0B06D1CD1F154397013
Verified2017-12-19ATH30656E0B06D1CD1F125244113
Verified2020-04-23Oliver KruseC89A136922F4B224180778253
Verified2025-05-12kkmrkkblmbrbkC89A136922F4B224185090653
History
DateUserTypeResult
2025-05-12EthanDCERT
PRP Certification
Proof certified good
2025-05-12kkmrkkblmbrbkC-PRP
M895571/345690407 : C89A136922F4B224
PRP proof power = 6
PRP: Verified
Proof certified good
2024-04-27Anton TsvetkovNF-PM1
B1=8000000, B2=10002760950
2020-04-23Oliver KruseC-PRP
M895571/345690407 : C89A136922F4B224
PRP: Verified
PRP without proof (small exponent)
2017-12-19ATHC-PRP
M895571/345690407 : 30656E0B06D1CD1F
PRP: Verified
PRP without proof (small exponent)
2017-10-14Oliver KruseC-PRP
M895571/345690407 : 30656E0B06D1CD1F
PRP: Verified
PRP without proof (small exponent)
2017-09-28Oliver KruseC-PRP
M895571/345690407 : 30656E0B06D1CD1F
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=300000, B2=10000000, E=12