Marin Mersenne 2^P-1
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MnStatusDetails
16833917Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
2191740688374648528172167.62018-03-25 23:21:38
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)2002-11-09Jose Manuel Garcia64AB78BD975E27529071927
Bad2006-05-12Keith O'DellD6F4A5527A0675B19548234
Verified (Factored)2007-09-28Shane Sanford64AB78BD975E27523019134
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2024-08-03Ryan Propper937CA4630561DF731328118053
History
DateUserTypeResult
2024-08-03Luke DurantCERT
PRP Certification
Proof certified good
2024-08-03Ryan PropperC-PRP
M16833917/219174068837464852817 : 937CA4630561DF73
PRP proof power = 8
PRP: Verified
Proof certified good
2024-05-07nordiNF-PM1
B1=500000, B2=254324994
2024-03-10nordiNF-PM1
B1=500000
2018-03-25ramgeisF
Factor: 219174068837464852817 / TF: 67-68*
2016-03-16Mark RoseNF
no factor from 2^65 to 2^66
2014-09-15NesowaNF
no factor from 2^66 to 2^67