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
8887Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
7824721426631239.5old
34407768217431341.6old
130676095064562824047918095642152196014340129.9old
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 Kruse8CFB23E2A74A494D3013
Verified2017-10-02kkmrkkblmbrbk8CFB23E2A74A494D3013
Verified2017-12-07ATH8CFB23E2A74A494D3514513
Verified2020-04-17Oliver Kruse98A4E70B990DAA19351753
Verified2024-07-01kkmrkkblmbrbk98A4E70B990DAA193530953
P-1 factors
DateFactorB1B2
2023-08-092692312012134432416321609100000000100000000
History
DateUserTypeResult
2024-07-01kkmrkkblmbrbkC-PRP
M8887/1306760950645628240479180956421521960143/3440776821743/782472142663 : 98A4E70B990DAA19
PRP: Verified
PRP without proof (small exponent)
2023-08-09BoYuan ChenF-PM1
Factors: 3440776821743,782472142663 / (P-1, B1=100000000)
2023-08-03JacobZNF-PM1
B1=66000000000, B2=254680416808818000
2021-12-16Lisander ViaeneNF-PM1
B1=100000000
2020-04-17Oliver KruseC-PRP
M8887/782472142663/3440776821743/1306760950645628240479180956421521960143 : 98A4E70B990DAA19
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M8887/782472142663/3440776821743/1306760950645628240479180956421521960143 : 8CFB23E2A74A494D
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M8887/782472142663/3440776821743/1306760950645628240479180956421521960143 : 8CFB23E2A74A494D
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M8887/known_factors : 8CFB23E2A74A494D
PRP without proof (not generated)