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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
48481Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
655631271180549237755537272685.8old
202546390669830426592672091382420394051940130.62023-05-05 10:17:27
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
403000000673 / 4588
Estimated T-Level: 35.7
TF below 2^114 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-21Oliver Kruse7990D20BE32DB0241013
Verified (Factored)2017-09-21Oliver Kruse7990D20BE32DB0241013
Verified (Factored)2017-11-06kkmrkkblmbrbk7990D20BE32DB0241383113
Verified (Factored)2020-04-17Oliver Kruse7C54C292FC89C7AD11827553
Verified2023-05-05JacobZ7C54C292FC89C7AD23610653
P-1 factors
DateFactorB1B2
2023-05-052025463906698304265926720913824203940519730000000562856158764900
History
DateUserTypeResult
2024-12-14masserNF-PP1
Start=96/17, B1=45000000, B2=44955000000
2024-12-12masserNF-PP1
Start=6/5, B1=45000000, B2=44955000000
2024-12-05masserNF-PP1
Start=2/7, B1=45000000, B2=44955000000
2023-05-05JacobZC-PRP
M48481/65563127118054923775553727/2025463906698304265926720913824203940519 : 7C54C292FC89C7AD
PRP: Verified
PRP without proof (small exponent)
2023-05-05JacobZF-PM1
Factor: 2025463906698304265926720913824203940519 / (P-1, B1=730000000, B2=562856158764900)
2020-04-17Oliver KruseC-PRP
M48481/65563127118054923775553727 : 7C54C292FC89C7AD
PRP: Verified
PRP without proof (small exponent)
2017-11-06kkmrkkblmbrbkC-PRP
M48481/65563127118054923775553727 : 7990D20BE32DB024
PRP: Verified
PRP without proof (small exponent)
2017-09-21Oliver KruseC-PRP
M48481/65563127118054923775553727 : 7990D20BE32DB024
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M48481/65563127118054923775553727 : 7990D20BE32DB024
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M48481/65563127118054923775553727 : 7990D20BE32DB024
PRP without proof (not generated)
2016-09-30kkmrkkblmbrbkNF-PM1
B1=100000000, B2=2000000000, E=12