Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
1938611Factored
FactorDigitsBitsDate
1271813843478471546.9old
33210487824950041809347932581.52021-12-22 23:16:30
ECM
DigitsB1Curves
2550000280 / 280
30250000145 / 640
Estimated T-Level: 26.1
TF below 2^82 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-30alpertron83B6F088744993411013
Verified (Factored)2017-10-20Oliver Kruse83B6F08874499341140920313
Verified2021-12-24JackBlock4433A5696F5F91792149620253
Verified2021-12-24_p95holder_4433A5696F5F91792116340553
History
DateUserTypeResult
2021-12-24_p95holder_C-PRP
M1938611/127181384347847/3321048782495004180934793 : 4433A5696F5F9179
PRP: Verified
PRP without proof (not generated)
2021-12-24Will EdgingtonCERT
PRP Certification
Proof certified good
2021-12-24JackBlockC-PRP
M1938611/127181384347847/3321048782495004180934793 : 4433A5696F5F9179
PRP proof power = 7
PRP: Verified
Proof certified good
2021-12-22_p95holder_F-ECM
Factor: 3321048782495004180934793 / (ECM curve 1, B1=50000, B2=5000000)
2017-10-20Oliver KruseC-PRP
M1938611/127181384347847 : 83B6F08874499341
PRP: Verified
PRP without proof (not generated)
2017-09-30alpertronC-PRP
M1938611/127181384347847 : 83B6F08874499341
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12