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
8237Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
1054337720.0old
1444377349782411547.0old
2804777710286811548.0old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
50440000006889 / 16550
Estimated T-Level: 47.1
TF below 2^151 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse1F7BC519EC338A813013
Verified2017-10-12kkmrkkblmbrbk1F7BC519EC338A813532313
Verified2020-04-17Oliver Kruse074AF34CB14296E63174453
Verified2024-07-01kkmrkkblmbrbk074AF34CB14296E63346953
History
DateUserTypeResult
2024-07-01kkmrkkblmbrbkC-PRP
M8237/1054337/144437734978241/280477771028681 : 074AF34CB14296E6
PRP: Verified
PRP without proof (small exponent)
2023-08-31JacobZNF-PM1
B1=71000000000, B2=265422648792401100
2021-12-16Lisander ViaeneNF-PM1
B1=100000000
2020-04-17Oliver KruseC-PRP
M8237/1054337/144437734978241/280477771028681 : 074AF34CB14296E6
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M8237/1054337/144437734978241/280477771028681 : 1F7BC519EC338A81
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M8237/1054337/144437734978241/280477771028681 : 1F7BC519EC338A81
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M8237/1054337/144437734978241/280477771028681 : 1F7BC519EC338A81
PRP without proof (not generated)