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
5531Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
940271619.8old
146399043431133.8old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
50440000005367 / 16550
Estimated T-Level: 46.6
TF below 2^150 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver KruseC1B41CA77DD200402013
Verified2017-10-12kkmrkkblmbrbkC1B41CA77DD200402147713
Verified2020-04-17Oliver Kruse5CF7A600B82F46372466853
Verified2024-02-03Wentao Huang5CF7A600B82F46372317453
History
DateUserTypeResult
2024-07-26mikrNF-PM1
B1=500000000000, B2=1235156303186695890
2024-02-03Wentao HuangC-PRP
M5531/940271/14639904343 : 5CF7A600B82F4637
PRP: Verified
PRP without proof (small exponent)
2023-07-13-Anonymous-NF-PM1
B1=45000000000, B2=181622797963056450
2022-01-26Ethan O'ConnorNF-PM1
B1=1300000000
2021-12-16Oliver KruseNF-PM1
B1=1000000000, B2=1002106985940060
2020-04-17Oliver KruseC-PRP
M5531/940271/14639904343 : 5CF7A600B82F4637
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M5531/940271/14639904343 : C1B41CA77DD20040
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M5531/940271/14639904343 : C1B41CA77DD20040
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M5531/940271/14639904343 : C1B41CA77DD20040
PRP without proof (not generated)