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
478213Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
11477113823.5old
33474911825.02008-07-21 09:20:06
ECM
DigitsB1Curves
2550000280 / 280
30250000200 / 640
Estimated T-Level: 26.6
TF below 2^83 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-26Oliver Kruse04E1DEBC21BE36B72013
Verified2017-09-27Oliver Kruse04E1DEBC21BE36B72013
Verified2017-11-09kkmrkkblmbrbk04E1DEBC21BE36B7218559013
Verified2020-04-18Oliver Kruse016C8FC4E5039CDA238341753
Verified2024-11-23kkmrkkblmbrbk016C8FC4E5039CDA233844453
History
DateUserTypeResult
2024-11-23XyzzyCERT
PRP Certification
Proof certified good
2024-11-23kkmrkkblmbrbkC-PRP
M478213/11477113/33474911 : 016C8FC4E5039CDA
PRP proof power = 6
PRP: Verified
Proof certified good
2024-08-26tbusbyNF-PM1
B1=30000000, B2=163964580780
2024-08-18alex4NF-PM1
B1=16000000, B2=2043045794790
2020-04-18Oliver KruseC-PRP
M478213/11477113/33474911 : 016C8FC4E5039CDA
PRP: Verified
PRP without proof (small exponent)
2017-11-09kkmrkkblmbrbkC-PRP
M478213/11477113/33474911 : 04E1DEBC21BE36B7
PRP: Verified
PRP without proof (small exponent)
2017-09-27Oliver KruseC-PRP
M478213/11477113/33474911 : 04E1DEBC21BE36B7
PRP: Verified
PRP without proof (not generated)
2017-09-26Oliver KruseC-PRP
M478213/11477113/33474911 : 04E1DEBC21BE36B7
PRP: Verified
PRP without proof (not generated)
2008-07-21J FeitsmaF
Factor: 33474911