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
2047741Factored
FactorDigitsBitsDate
638895193929.3old
24552038450084311046472271.12021-07-17 19:13:17
ECM
DigitsB1Curves
2550000280 / 280
30250000181 / 640
Estimated T-Level: 26.4 ⓘ
TF below 2^83 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-10-06Oliver Kruse5BEC4D22C3EF0F951013
Verified (Factored)2017-11-15kkmrkkblmbrbk5BEC4D22C3EF0F95127429613
Verified2021-07-18/r/counting72D26C4A252998C32127496853
History
DateUserTypeResult
2021-07-18Hiroyuki YasuiCERT
PRP Certification
Proof certified good
2021-07-18/r/countingC-PRP
M2047741/638895193/2455203845008431104647 : 72D26C4A252998C3
PRP proof power = 7
PRP: Verified
Proof certified good
2021-07-17_p95holder_F-ECM
Factor: 2455203845008431104647 / (ECM curve 2, B1=50000, B2=5000000)
2017-11-15kkmrkkblmbrbkC-PRP
M2047741/638895193 : 5BEC4D22C3EF0F95
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-06Oliver KruseC-PRP
M2047741/638895193 : 5BEC4D22C3EF0F95
PRP: Verified (Factored)
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12