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
1955531Factored
FactorDigitsBitsDate
15644249823.9old
109509737926.72008-07-15 07:48:39
4829591013079985914392168.72022-01-20 13:53:29
ECM
DigitsB1Curves
2550000280 / 280
30250000106 / 640
Estimated T-Level: 25.8 ⓘ
TF below 2^81 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-10-05Oliver Kruse191B56FC0655E5022013
Verified (Factored)2017-11-11kkmrkkblmbrbk191B56FC0655E5022101585713
Verified2022-01-20JackBlockBBE38B2106F90FCA3153863153
Verified2022-01-22_p95holder_BBE38B2106F90FCA3127995653
History
DateUserTypeResult
2022-01-22_p95holder_C-PRP
M1955531/15644249/109509737/482959101307998591439 : BBE38B2106F90FCA
PRP: Verified
PRP without proof (not generated)
2022-01-21Ben DeloCERT
PRP Certification
Proof certified good
2022-01-20JackBlockC-PRP
M1955531/15644249/109509737/482959101307998591439 : BBE38B2106F90FCA
PRP proof power = 7
PRP: Verified
Proof certified good
2022-01-20_p95holder_F-ECM
Factor: 482959101307998591439 / (ECM curve 7, B1=50000, B2=5000000)
2017-11-11kkmrkkblmbrbkC-PRP
M1955531/15644249/109509737 : 191B56FC0655E502
PRP: Verified
PRP without proof (not generated)
2017-10-05Oliver KruseC-PRP
M1955531/15644249/109509737 : 191B56FC0655E502
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12
2008-07-15J FeitsmaF
Factor: 109509737