Marin Mersenne 2^P-1
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MnStatusDetails
17285161Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
1993580021286589667039272477.42025-01-09 15:47:56
ECM
DigitsB1Curves
25500001 / 280
Estimated T-Level: 20.0 ⓘ
TF below 2^61 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2004-05-25Roy HarrisCECF431A8128CECB28386
Verified (Factored)2006-03-01Eric HahnCECF431A8128CECB7971165
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2025-01-15jeriffee6F4D13F45753F5A3161548353
P-1 factors
DateFactorB1B2
2025-01-0919935800212865896670392712500006818366100
History
DateUserTypeResult
2025-01-15ky0urakuCERT
PRP Certification
Proof certified good
2025-01-15jeriffeeC-PRP
M17285161/199358002128658966703927 : 6F4D13F45753F5A3
PRP proof power = 8
PRP: Verified
Proof certified good
2025-01-10linamentNF
no factor from 2^73 to 2^74
2025-01-09linamentF-PM1
Factor: 199358002128658966703927 / (P-1, B1=1250000, B2=6818366100)
2021-04-11-Anonymous-NF
no factor from 2^72 to 2^73
2021-04-10-Anonymous-NF
no factor from 2^71 to 2^72
2021-04-10-Anonymous-NF
no factor from 2^70 to 2^71
2020-03-26lycornNF
no factor from 2^69 to 2^70
2018-02-13ramgeisNF
no factor from 2^68 to 2^69
2018-02-13ramgeisNF
no factor from 2^67 to 2^68
2014-09-05NesowaNF
no factor from 2^66 to 2^67
2014-03-07NesowaNF
no factor from 2^65 to 2^66