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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
4182407Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
169218529305907817700063717292993.82023-09-16 21:40:45
ECM
DigitsB1Curves
255000074 / 280
Estimated T-Level: 21.3 ⓘ
TF below 2^66 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)John Lloyd90070C39D3E7BBA00
Verified (Factored)1999-11-04John Milton90070C39D3E7BBA01186093
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-09-16James Heinrich880AD85F15015C66195820453
History
DateUserTypeResult
2023-09-16slandrumCERT
PRP Certification
Proof certified good
2023-09-16James HeinrichC-PRP
M4182407/16921852930590781770006371729 : 880AD85F15015C66
PRP proof power = 7
PRP: Verified
Proof certified good
2023-09-16James HeinrichF-ECM
Factor: 16921852930590781770006371729 / (ECM curve 32, B1=50000, B2=25127190, Sigma=8558061457681134)
2022-12-12DRobinsonPENF-PM1
B1=6200000, B2=32702012070
2022-08-01Denial140NF
no factor from 2^71 to 2^72
2022-05-29mikrNF
no factor from 2^70 to 2^71
2021-06-28axnNF
no factor from 2^69 to 2^70
2021-06-21TJAOINF
no factor from 2^68 to 2^69
2021-04-24Zhang RuichongNF-PM1
B1=500000, B2=20000000
2018-12-07YxinityNF
no factor from 2^67 to 2^68
2017-12-21YxinityNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-06-05snme2pm1NF
no factor from 2^65 to 2^66
2013-12-29Squeeky_SquirrelNF-PM1
B1=145000, B2=3371250, E=6
2013-11-02David CampeauNF
no factor from 2^64 to 2^65
2013-10-21JayderNF
no factor from 2^63 to 2^64
2011-05-28GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-01-26Grant McCrackenNF
no factor from 2^61 to 2^62
2008-11-01Jayson KingNF-PM1
B1=55000, B2=1100000, E=6