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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
386723Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
773447619.6old
ECM
DigitsB1Curves
2550000280 / 280
30250000457 / 640
Estimated T-Level: 28.6
TF below 2^90 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-23Oliver KruseF251F2127067FCB51013
Verified2017-11-02kkmrkkblmbrbkF251F2127067FCB5110553813
Verified2020-04-18Oliver Kruse7B692158493B57F7130978153
Verified2022-05-12Jorge Coveiro7B692158493B57F7112328753
Verified2025-01-01kkmrkkblmbrbk7B692158493B57F7118559653
History
DateUserTypeResult
2025-01-01Cosmos95CERT
PRP Certification
Proof certified good
2025-01-01kkmrkkblmbrbkC-PRP
M386723/773447 : 7B692158493B57F7
PRP proof power = 5
PRP: Verified
Proof certified good
2024-09-17yuriy5-1NF-PM1
B1=12000002, B2=1719840021900
2024-02-19Denial140NF-PM1
B1=1000000, B2=6154694700
2022-05-12Jorge CoveiroC-PRP
M386723/773447 : 7B692158493B57F7
PRP proof power = 5
PRP: Verified
PRP proof never uploaded
2022-02-07Lisander ViaeneNF-PM1
B1=50000
2020-04-18Oliver KruseC-PRP
M386723/773447 : 7B692158493B57F7
PRP: Verified
PRP without proof (small exponent)
2017-11-02kkmrkkblmbrbkC-PRP
M386723/773447 : F251F2127067FCB5
PRP: Verified
PRP without proof (small exponent)
2017-09-23Oliver KruseC-PRP
M386723/773447 : F251F2127067FCB5
PRP: Verified
PRP without proof (not generated)