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
8867Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
70937516.1old
92841746171033.1old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000010831 / 16550
Estimated T-Level: 48.3
TF below 2^155 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse94CBF74E69890D312013
Verified2017-10-12kkmrkkblmbrbk94CBF74E69890D312873413
Verified2020-04-17Oliver KruseB6EBBB7487A08D4D2708153
Verified2024-07-01kkmrkkblmbrbkB6EBBB7487A08D4D2858253
History
DateUserTypeResult
2024-07-01kkmrkkblmbrbkC-PRP
M8867/70937/9284174617 : B6EBBB7487A08D4D
PRP: Verified
PRP without proof (small exponent)
2023-08-03JacobZNF-PM1
B1=66000000000, B2=254680416808818000
2021-12-16Lisander ViaeneNF-PM1
B1=100000000
2020-04-17Oliver KruseC-PRP
M8867/70937/9284174617 : B6EBBB7487A08D4D
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M8867/70937/9284174617 : 94CBF74E69890D31
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M8867/70937/9284174617 : 94CBF74E69890D31
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M8867/70937/9284174617 : 94CBF74E69890D31
PRP without proof (not generated)