Marin Mersenne 2^P-1
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MnStatusDetails
13895927Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
8556016547598254800492169.52021-08-08 08:02:10
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)2002-06-02Jan Braconnier80DA4014EBB647E81122124
Verified (Factored)2005-10-04Karn Griffen80DA4014EBB647E87989628
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-11-03Funky Waddle11478C5B76FBA0E011250634153
History
DateUserTypeResult
2025-06-16GregF
Factor: 855601654759825480049 / TF: 69-70
2023-11-03nordiNF-PM1
B1=500000, B2=320708850
2023-10-26nordiNF-PM1
B1=500000
2022-11-03VahehCERT
PRP Certification
Proof certified good
2022-11-03Funky WaddleC-PRP
M13895927/855601654759825480049 : 11478C5B76FBA0E0
PRP proof power = 8
PRP: Verified
Proof certified good
2021-08-08SRBaseF
Factor: 855601654759825480049 / TF: 69-70*
2018-01-14ramgeisNF
no factor from 2^68 to 2^69
2017-12-23-Anonymous-NF
no factor from 2^67 to 2^68
2015-09-07NesowaNF
no factor from 2^66 to 2^67
2014-07-08NesowaNF
no factor from 2^65 to 2^66