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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
10212863Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
16663866457488571004172270.52021-01-17 16:37:12
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)2000-07-03Don Truman000148EABBC00DF1374848
Verified (Factored)2003-12-13Gord Palameta000148EABBC00DF12022204
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-01-18mrhA50B30EE914F4AB21707244853
History
DateUserTypeResult
2025-06-19GregF
Factor: 1666386645748857100417 / TF: 70-71
2021-01-18Oliver KruseCERT
PRP Certification
Proof certified good
2021-01-18mrhC-PRP
M10212863/1666386645748857100417 : A50B30EE914F4AB2
PRP proof power = 8
PRP: Verified
Proof certified good
2021-01-17-Anonymous-F
Factor: 1666386645748857100417 / TF: 70-71*
2020-12-19ViliamFNF-PM1
B1=1000000, B2=30000000
2020-07-28ViliamFNF
no factor from 2^69 to 2^70
2017-12-12ramgeisNF
no factor from 2^68 to 2^69
2017-09-26-Anonymous-NF
no factor from 2^67 to 2^68
2015-11-23VictordeHollanderNF
no factor from 2^66 to 2^67
2015-04-25ThaNF
no factor from 2^65 to 2^66
2013-09-18NesowaNF
no factor from 2^64 to 2^65
2013-06-01NesowaNF-PM1
B1=125000, B2=2468750, E=6