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
238729Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
43926137825.4old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000213 / 1566
Estimated T-Level: 30.7
TF below 2^97 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-22Oliver Kruse010D1F82064B4BAA1013
Verified2017-09-22Oliver Kruse010D1F82064B4BAA1013
Verified2017-11-06kkmrkkblmbrbk010D1F82064B4BAA1555313
Verified2020-04-17Oliver KruseA61082194F37EB1E19392653
Verified2024-02-03Wentao HuangA61082194F37EB1E16855653
History
DateUserTypeResult
2024-02-03curtiscCERT
PRP Certification
Proof certified good
2024-02-03Wentao HuangC-PRP
M238729/43926137 : A61082194F37EB1E
PRP proof power = 5
PRP: Verified
Proof certified good
2022-04-04Oliver KruseNF-PM1
B1=30000000, B2=10120247026890
2021-07-16Oliver KruseNF-PM1
B1=30000000, B2=3000000000, E=24
2020-04-17Oliver KruseC-PRP
M238729/43926137 : A61082194F37EB1E
PRP: Verified
PRP without proof (small exponent)
2017-11-06kkmrkkblmbrbkC-PRP
M238729/43926137 : 010D1F82064B4BAA
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M238729/43926137 : 010D1F82064B4BAA
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M238729/43926137 : 010D1F82064B4BAA
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M238729/43926137 : 010D1F82064B4BAA
PRP without proof (not generated)