Marin Mersenne 2^P-1
Username
Password
Forgot password?
White
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
12661433Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
2320351469384250291530955789427332104.22021-12-24 03:08:04
ECM
DigitsB1Curves
25500002 / 280
Estimated T-Level: 20.0 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)2001-06-23Mark Zuwala9F24FFBC194E81297364960
Verified (Factored)2004-10-03Penny Black Q9F24FFBC194E81298812851
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-04-28XZTFF4E027AA11845741192319153
P-1 factors
DateFactorB1B2
2021-12-2423203514693842502915309557894273700000707599200
History
DateUserTypeResult
2022-04-28hordkhenCERT
PRP Certification
Proof certified good
2022-04-28XZTC-PRP
M12661433/23203514693842502915309557894273 : FF4E027AA1184574
PRP proof power = 8
PRP: Verified
Proof certified good
2021-12-24LuminescenceF-PM1
Factor: 23203514693842502915309557894273 / (P-1, B1=700000, B2=707599200)
2021-10-29-Anonymous-NF
no factor from 2^71 to 2^72
2021-08-29SRBaseNF
no factor from 2^70 to 2^71
2021-08-09SRBaseNF
no factor from 2^69 to 2^70
2018-01-07ramgeisNF
no factor from 2^68 to 2^69
2018-01-07ramgeisNF
no factor from 2^67 to 2^68
2015-03-30ThaNF
no factor from 2^66 to 2^67
2014-04-07NesowaNF
no factor from 2^65 to 2^66
2013-06-11lycornNF
no factor from 2^64 to 2^65