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:





MnDetails
6553
Composite, with 6 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
1454767720.5old
102865324331133.3old
26111944265108357511961.2old
481487879232583716892065.4old
97338256809900529568340543165239213692739129.52021-03-25 18:28:34
70483560152783049519224624347010168652087803701748158.92021-03-26 03:03:49
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
50440000002716 / 16550
Estimated T-Level: 45.8 ⓘ
TF below 2^147 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Factored
No proof (small exponent)
2017-09-21Oliver Kruse6977DA5AEE05274E4013
Factored
No proof (small exponent)
2017-10-02kkmrkkblmbrbk6977DA5AEE05274E4013
Factored
No proof (small exponent)
2017-12-07ATH6977DA5AEE05274E4450513
Factored
No proof (small exponent)
2020-04-17Oliver Kruse3FE02D4E1B3BE52D4455553
Factored
No proof (small exponent)
2021-03-25riccardo uberti3FE02D4E1B3BE52D5157953
Verified
No proof (small exponent)
2021-03-26mikr3FE02D4E1B3BE52D6513953
Verified
No proof (small exponent)
2021-03-26mnd93FE02D4E1B3BE52D6126553
Verified
No proof (small exponent)
2021-03-27rbanov3FE02D4E1B3BE52D6614253
History
DateUserTypeResult
2025-03-21masserNF-PP1Start=142/17, B1=1000000000, B2=999000000000
2025-03-12masserNF-PP1Start=6/5, B1=1000000000, B2=999000000000
2025-03-04masserNF-PP1Start=2/7, B1=1000000000, B2=999000000000
2023-08-09-anonymous-NF-PM1B1=37000000000, B2=148599418701633900
2021-08-27Seth_TrNF-PM1B1=400000000
2021-03-27rbanovC-PRPM6553/1454767/10286532433/2611194426510835751/48148787923258371689/973382568099005295683405431652392136927/704835601527830495192246243470101686520878037017 : 3FE02D4E1B3BE52D
2021-03-26mnd9C-PRPM6553/1454767/10286532433/2611194426510835751/48148787923258371689/973382568099005295683405431652392136927/704835601527830495192246243470101686520878037017 : 3FE02D4E1B3BE52D
2021-03-26mikrC-PRPM6553/1454767/10286532433/2611194426510835751/48148787923258371689/973382568099005295683405431652392136927/704835601527830495192246243470101686520878037017 : 3FE02D4E1B3BE52D
2021-03-26Ryan PropperF-ECMFactor: 704835601527830495192246243470101686520878037017
2021-03-25riccardo ubertiC-PRPM6553/1454767/10286532433/2611194426510835751/48148787923258371689/973382568099005295683405431652392136927 : 3FE02D4E1B3BE52D
2021-03-25Ryan PropperF-ECMFactor: 973382568099005295683405431652392136927
2020-04-17Oliver KruseC-PRPM6553/1454767/10286532433/2611194426510835751/48148787923258371689 : 3FE02D4E1B3BE52D
2017-12-07ATHC-PRPM6553/1454767/10286532433/2611194426510835751/48148787923258371689 : 6977DA5AEE05274E
2017-10-02kkmrkkblmbrbkC-PRPM6553/1454767/10286532433/2611194426510835751/48148787923258371689 : 6977DA5AEE05274E
2017-09-21Oliver KruseC-PRPM6553/known_factors : 6977DA5AEE05274E