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
1993477Composite, with 5 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
11960863823.5old
445263022731135.42008-07-15 07:49:05
2009919995686811547.52014-03-07 11:18:43
5082304576625308331858.82015-10-05 11:25:01
1879999988217592891992167.32021-03-11 22:12:20
ECM
DigitsB1Curves
2550000280 / 280
30250000105 / 640
Estimated T-Level: 25.8
TF below 2^81 is very unlikely to find new factors due to ECM effort.
PRP
StatusDateUserResidueShiftTypeBase
Verified (Factored)2025-09-02Kriesel83D68C276A6BE7D3013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-30alpertron781B0F55F1A146A14013
Verified (Factored)2017-10-20Oliver Kruse781B0F55F1A146A14155068013
Verified2021-03-11ATH83D68C276A6BE7D35129631053
History
DateUserTypeResult
2025-09-03JurzalCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
83D68C276A6BE7D3
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2022-08-15USAFSSNF-PM1
B1=132000, B2=134381520
2021-03-12curtiscCERT
PRP Certification
Proof certified good
2021-03-11ATHC-PRP
M1993477/11960863/44526302273/200991999568681/508230457662530833/187999998821759289199 : 83D68C276A6BE7D3
PRP proof power = 7
PRP: Verified
Proof certified good
2021-03-11_p95holder_F-ECM
Factor: 187999998821759289199 / (ECM curve 6, B1=50000, B2=5000000)
2017-10-20Oliver KruseC-PRP
M1993477/11960863/44526302273/200991999568681/508230457662530833 : 781B0F55F1A146A1
PRP: Verified (Factored)
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M1993477/11960863/200991999568681/44526302273/508230457662530833 : 781B0F55F1A146A1
PRP: Verified (Factored)
PRP without proof (not generated)
2015-10-05TJAOIF
Factor: 508230457662530833 / TF: 58-59
2014-03-07TJAOIF
Factor: 200991999568681
2008-07-15J FeitsmaF
Factor: 44526302273