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
872843Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
1745687720.7old
ECM
DigitsB1Curves
2550000280 / 280
30250000100 / 640
Estimated T-Level: 25.8
TF below 2^81 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-28Oliver Kruse2579C91B7F66B01E1013
Verified2017-10-14Oliver Kruse2579C91B7F66B01E175052413
Verified2017-12-19ATH2579C91B7F66B01E153035013
Verified2020-04-22Oliver Kruse3EC68074AA03247F166518753
Verified2022-05-12Jorge Coveiro3EC68074AA03247F164865053
Verified2022-05-12Jorge Coveiro3EC68074AA03247F164865053
Verified2025-01-04kkmrkkblmbrbk3EC68074AA03247F132307553
History
DateUserTypeResult
2025-01-05MarvinistCERT
PRP Certification
Proof certified good
2025-01-04kkmrkkblmbrbkC-PRP
M872843/1745687 : 3EC68074AA03247F
PRP proof power = 6
PRP: Verified
Proof certified good
2022-05-12Jorge CoveiroC-PRP
M872843/1745687 : 3EC68074AA03247F
PRP proof power = 6
PRP: Verified
PRP proof never uploaded
2020-04-22Oliver KruseC-PRP
M872843/1745687 : 3EC68074AA03247F
PRP: Verified
PRP without proof (small exponent)
2017-12-19ATHC-PRP
M872843/1745687 : 2579C91B7F66B01E
PRP: Verified
PRP without proof (small exponent)
2017-10-14Oliver KruseC-PRP
M872843/1745687 : 2579C91B7F66B01E
PRP: Verified
PRP without proof (small exponent)
2017-09-28Oliver KruseC-PRP
M872843/1745687 : 2579C91B7F66B01E
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=300000, B2=10000000, E=12