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
1081051Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
554519908951492491755.6old
4109229511141780727932168.52017-03-31 11:16:10
ECM
DigitsB1Curves
2550000280 / 280
30250000104 / 640
Estimated T-Level: 25.8 ⓘ
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Bill Daly0092F75073FD8CD70
Verified (Factored)Andrew Churchill0092F75073FD8CD70
PRP
StatusDateUserResidueShiftTypeBase
Verified (Factored)2025-09-01KrieselA36FC863616EFA99013
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-28Oliver KruseF977179F939388E52013
Verified2017-10-18kkmrkkblmbrbkF977179F939388E5295109313
History
DateUserTypeResult
2025-09-01AN0NYM0USCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-01KrieselC-PRP
A36FC863616EFA99
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2024-08-23cramsey87NF-PM1
B1=3000000, B2=22221719520
2017-10-18kkmrkkblmbrbkC-PRP
M1081051/55451990895149249/410922951114178072793 : F977179F939388E5
PRP: Verified
PRP without proof (not generated)
2017-09-28Oliver KruseC-PRP
M1081051/55451990895149249/410922951114178072793 : F977179F939388E5
PRP: Verified
PRP without proof (not generated)
2017-03-31TJAOIF-ECM
Factor: 410922951114178072793 / (ECM curve 6, B1=50000, B2=5000000)