Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
386747Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
53730064889068564311962.2old
1415885414351236363244392476.92014-10-31 13:34:59
ECM
DigitsB1Curves
2550000280 / 280
30250000378 / 640
Estimated T-Level: 28.0
TF below 2^88 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-23Oliver Kruse04E67766D9BFC37D2013
Verified2017-10-13Oliver Kruse04E67766D9BFC37D217512113
Verified2017-12-15ATH04E67766D9BFC37D220237613
Verified2020-04-18Oliver Kruse1748BD9D126A3A59236290253
Verified2024-10-04kkmrkkblmbrbk1748BD9D126A3A59232134253
History
DateUserTypeResult
2024-10-04Luke DurantCERT
PRP Certification
Proof certified good
2024-10-04kkmrkkblmbrbkC-PRP
M386747/5373006488906856431/141588541435123636324439 : 1748BD9D126A3A59
PRP proof power = 5
PRP: Verified
Proof certified good
2024-09-23yuriy5-1NF-PM1
B1=12000002, B2=2110712904300
2024-02-19Denial140NF-PM1
B1=1000000, B2=6154694700
2022-02-07Lisander ViaeneNF-PM1
B1=50000
2020-04-18Oliver KruseC-PRP
M386747/5373006488906856431/141588541435123636324439 : 1748BD9D126A3A59
PRP: Verified
PRP without proof (small exponent)
2017-12-15ATHC-PRP
M386747/5373006488906856431/141588541435123636324439 : 04E67766D9BFC37D
PRP: Verified
PRP without proof (small exponent)
2017-10-13Oliver KruseC-PRP
M386747/5373006488906856431/141588541435123636324439 : 04E67766D9BFC37D
PRP: Verified
PRP without proof (small exponent)
2017-09-23Oliver KruseC-PRP
M386747/known_factors : 04E67766D9BFC37D
PRP without proof (not generated)
2014-10-31TJAOIF-ECM
Factor: 141588541435123636324439