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
247259Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
494519618.9old
9331317291371239.82008-07-21 09:14:53
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000189 / 1566
Estimated T-Level: 30.6
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 Kruse165B1BA4540EDE682013
Verified2017-10-12Oliver Kruse165B1BA4540EDE68211084713
Verified2017-11-06kkmrkkblmbrbk165B1BA4540EDE6821225813
Verified2020-04-17Oliver KruseB2B7A423E2BFFD6A218484153
Verified (Factored)2022-05-12Jorge CoveiroB2B7A423E2BFFD6A12531353
Verified2024-02-03Wentao HuangB2B7A423E2BFFD6A218907753
History
DateUserTypeResult
2024-02-03Naegi MakotoCERT
PRP Certification
Proof certified good
2024-02-03Wentao HuangC-PRP
M247259/494519/933131729137 : B2B7A423E2BFFD6A
PRP proof power = 5
PRP: Verified
Proof certified good
2022-05-12Jorge CoveiroC-PRP
M247259/494519 : B2B7A423E2BFFD6A
PRP proof power = 5
PRP: Verified (Factored)
PRP proof never uploaded
2022-04-15Oliver KruseNF-PM1
B1=30000000, B2=10120247026890
2021-08-03Oliver KruseNF-PM1
B1=30000000, B2=3000000000, E=24
2020-04-17Oliver KruseC-PRP
M247259/494519/933131729137 : B2B7A423E2BFFD6A
PRP: Verified
PRP without proof (small exponent)
2017-11-06kkmrkkblmbrbkC-PRP
M247259/494519/933131729137 : 165B1BA4540EDE68
PRP: Verified
PRP without proof (small exponent)
2017-10-12Oliver KruseC-PRP
M247259/494519/933131729137 : 165B1BA4540EDE68
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M247259/494519/933131729137 : 165B1BA4540EDE68
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M247259/494519/933131729137 : 165B1BA4540EDE68
PRP without proof (not generated)
2008-07-21J FeitsmaF
Factor: 933131729137