Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
5987Composite, with 4 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
605837581671135.8old
1183334433407691546.7old
3269884320179550311858.2old
15240536148127852922827576628218889493412461745146.82020-11-14 13:52:24
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
50440000003750 / 16550
Estimated T-Level: 46.1 ⓘ
TF below 2^148 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-09-21Oliver KruseD0CD8F17D3E2672D3013
Verified (Factored)2017-10-02kkmrkkblmbrbkD0CD8F17D3E2672D3013
Verified (Factored)2017-12-07ATHD0CD8F17D3E2672D3136413
Verified (Factored)2020-04-17Oliver KruseA160B20E82C481473343353
Verified2020-11-14mrhA160B20E82C481474529053
History
DateUserTypeResult
2023-07-26-Anonymous-NF-PM1
B1=41000000000, B2=167114967216697500
2020-11-14mrhC-PRP
M5987/60583758167/118333443340769/326988432017955031/152405361481278529228275766282188894934124617 : A160B20E82C48147
PRP: Verified
PRP without proof (small exponent)
2020-11-14Ryan PropperF-ECM
Factor: 152405361481278529228275766282188894934124617 / (ECM curve 1, B1=43000000, B2=198654756318, Sigma=1415620955523150349)
2020-04-17Oliver KruseC-PRP
M5987/60583758167/118333443340769/326988432017955031 : A160B20E82C48147
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M5987/60583758167/118333443340769/326988432017955031 : D0CD8F17D3E2672D
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M5987/60583758167/118333443340769/326988432017955031 : D0CD8F17D3E2672D
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M5987/known_factors : D0CD8F17D3E2672D
PRP without proof (not generated)