Marin Mersenne 2^P-1
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MnStatusDetails
892523Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
205965443063750571754.22007-09-07 16:45:50
53492341915270888238454278412892.12024-03-26 15:39:25
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
Verified (Factored)2017-09-28Oliver Kruse93C5CE67EF8E3A391013
Verified (Factored)2017-10-15kkmrkkblmbrbk93C5CE67EF8E3A39182160613
Verified (Factored)2020-04-23Oliver Kruse7AC925700F03CBB0165063453
Verified2024-03-26Anton Tsvetkov7AC925700F03CBB0229700253
P-1 factors
DateFactorB1B2
2024-03-265349234191527088823845427841800000010086122970
History
DateUserTypeResult
2024-03-26OnychomysCERT
PRP Certification
Proof certified good
2024-03-26Anton TsvetkovC-PRP
M892523/20596544306375057/5349234191527088823845427841 : 7AC925700F03CBB0
PRP proof power = 6
PRP: Verified
Proof certified good
2024-03-26Anton TsvetkovF-PM1
Factor: 5349234191527088823845427841 / (P-1, B1=8000000, B2=10086122970)
2022-03-07LordJuliusNF
no factor from 2^58 to 2^59
2020-04-23Oliver KruseC-PRP
M892523/20596544306375057 : 7AC925700F03CBB0
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-10-15kkmrkkblmbrbkC-PRP
M892523/20596544306375057 : 93C5CE67EF8E3A39
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-09-28Oliver KruseC-PRP
M892523/20596544306375057 : 93C5CE67EF8E3A39
PRP: Verified (Factored)
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=300000, B2=10000000, E=12
2007-09-07Chad DavisF-ECM
Factor: 20596544306375057