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

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Exponent Range:










MnStatusDetails
197779Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
46280287825.5old
7117785367775591549.32014-04-28 11:39:20
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000235 / 1566
Estimated T-Level: 30.8
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 Kruse28B8987CF2BA2D022013
Verified2017-10-12kkmrkkblmbrbk28B8987CF2BA2D0221214113
Verified2020-04-17Oliver Kruse629F057388AC43E228788053
Verified2023-08-24USAFSS629F057388AC43E2211817253
History
DateUserTypeResult
2023-08-24curtiscCERT
PRP Certification
Proof certified good
2023-08-24USAFSSC-PRP
M197779/46280287/711778536777559 : 629F057388AC43E2
PRP proof power = 5
PRP: Verified
Proof certified good
2020-04-17Oliver KruseC-PRP
M197779/46280287/711778536777559 : 629F057388AC43E2
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M197779/46280287/711778536777559 : 28B8987CF2BA2D02
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M197779/46280287/711778536777559 : 28B8987CF2BA2D02
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M197779/46280287/711778536777559 : 28B8987CF2BA2D02
PRP without proof (not generated)
2017-09-18kkmrkkblmbrbkNF-PM1
B1=100000000, B2=2000000000, E=12
2014-04-28TJAOIF
Factor: 711778536777559