Marin Mersenne 2^P-1
Username
Password
Forgot password?
Black
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
278437Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
1670623720.7old
ECM
DigitsB1Curves
2550000280 / 280
30250000593 / 640
Estimated T-Level: 29.6
TF below 2^93 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-24Oliver Kruse1B4642C0150F42A01013
Verified2017-10-12Oliver Kruse1B4642C0150F42A0124492613
Verified2017-11-06kkmrkkblmbrbk1B4642C0150F42A011642413
Verified2020-04-17Oliver Kruse58579D6BB825DE01116563953
Verified2024-08-07kkmrkkblmbrbk58579D6BB825DE0112266153
History
DateUserTypeResult
2024-11-05yuriy_5-1NF-PM1
B1=25616204, B2=6253273236210
2024-08-07Luke DurantCERT
PRP Certification
Proof certified good
2024-08-07kkmrkkblmbrbkC-PRP
M278437/1670623 : 58579D6BB825DE01
PRP proof power = 5
PRP: Verified
Proof certified good
2023-03-19Naegi MakotoNF-PM1
B1=2000000, B2=79396947630
2022-01-03Lisander ViaeneNF-PM1
B1=100000
2020-04-17Oliver KruseC-PRP
M278437/1670623 : 58579D6BB825DE01
PRP: Verified
PRP without proof (small exponent)
2017-11-06kkmrkkblmbrbkC-PRP
M278437/1670623 : 1B4642C0150F42A0
PRP: Verified
PRP without proof (small exponent)
2017-10-12Oliver KruseC-PRP
M278437/1670623 : 1B4642C0150F42A0
PRP: Verified
PRP without proof (small exponent)
2017-09-24Oliver KruseC-PRP
M278437/1670623 : 1B4642C0150F42A0
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M278437/1670623 : 1B4642C0150F42A0
PRP without proof (not generated)