Marin Mersenne 2^P-1
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MnStatusDetails
3226841Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
128558426339743442330172373.42011-09-09 11:01:38
ECM
DigitsB1Curves
25500005 / 280
Estimated T-Level: 20.1 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Robert FribergF09D2070CC76B55B0
Verified (Factored)1999-11-04Sean MathiasF09D2070CC76B55B1156865
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-11-02kkmrkkblmbrbkC84FF9F91A514CEA1193926053
Verified2017-11-19Oliver KruseC84FF9F91A514CEA125193753
Assigned
AssignedUserWork TypeStage% DoneUpdatedExpired
2025-10-12featherfactor ECM small0.00 % 2025-10-12
History
DateUserTypeResult
2022-09-07JossNF-PM1
B1=1072684, B2=226749600
2022-04-03LordJuliusNF
no factor from 2^66 to 2^67
2022-04-03LordJuliusNF
no factor from 2^65 to 2^66
2022-04-03LordJuliusNF
no factor from 2^64 to 2^65
2022-04-03LordJuliusNF
no factor from 2^63 to 2^64
2022-04-03LordJuliusNF
no factor from 2^61 to 2^63
2022-01-24JossNF-PM1
B1=1072684, B2=119912100
2021-05-11JossNF
no factor from 2^67 to 2^68
2021-01-17JossNF-PM1
B1=322684, B2=3226841, E=6
2017-11-19Oliver KruseC-PRP
M3226841/12855842633974344233017 : C84FF9F91A514CEA
PRP: Verified
PRP without proof (not generated)
2017-11-02kkmrkkblmbrbkC-PRP
M3226841/12855842633974344233017 : C84FF9F91A514CEA
PRP: Verified
PRP without proof (not generated)
2011-09-09sannerud.comF-ECM
Factor: 12855842633974344233017
2011-09-06USAFSSNF-PM1
B1=60000, B2=1035000, E=6
2009-07-03Carsten KossendeyNF-PM1
B1=15000, B2=191250
2009-04-06S485122NF
no factor from 2^60 to 2^61