Marin Mersenne 2^P-1
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MnStatusDetails
11889547Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
875109031850219135359512376.22019-08-10 14:03:00
ECM
DigitsB1Curves
255000016 / 280
Estimated T-Level: 20.3 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2001-12-01IES R.Dieste-I.Larrosa7A4850F2A6E3F0059116404
Verified (Factored)2004-06-04Brian Jue7A4850F2A6E3F00510013198
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2019-08-11riccardo uberti2728A340198B427D1197323253
Verified2021-02-25Jaytholomew2728A340198B427D11182003353
P-1 factors
DateFactorB1B2
2019-08-10875109031850219135359514300000
History
DateUserTypeResult
2021-10-25riccardo ubertiNF-PM1
B1=900000, B2=20000000, E=12
2021-02-25PEDCERT
PRP Certification
Proof certified good
2021-02-25JaytholomewC-PRP
M11889547/87510903185021913535951 : 2728A340198B427D
PRP proof power = 8
PRP: Verified
Proof certified good
2019-08-11riccardo ubertiC-PRP
M11889547/87510903185021913535951 : 2728A340198B427D
PRP: Verified
PRP without proof (not generated)
2019-08-10riccardo ubertiF-PM1
Factor: 87510903185021913535951 / (P-1, B1=430000)
2018-02-05Oliver KruseNF
no factor from 2^67 to 2^72
2018-01-21ramgeisNF
no factor from 2^68 to 2^69
2018-01-21ramgeisNF
no factor from 2^67 to 2^68
2016-02-15VictordeHollanderNF
no factor from 2^66 to 2^67
2013-11-02NesowaNF
no factor from 2^65 to 2^66
2013-10-22lycornNF
no factor from 2^64 to 2^65