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
6449
Composite, with 6 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
51593515.7old
9786113856791239.8old
126346121475591443.5old
3384609711465059531858.2old
19391373823160393705974141416726146506984742137.22016-11-24 23:58:45
8866813652085828575387946833375184329316330915606251953175.92021-03-28 13:44:52
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
50440000002805 / 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)
2017-09-20kkmrkkblmbrbk5972DFD2CD79A60B5013
Factored
No proof (small exponent)
2017-09-25George Woltman5972DFD2CD79A60B5546413
Factored
No proof (small exponent)
2017-10-02kkmrkkblmbrbk5972DFD2CD79A60B5013
Factored
No proof (small exponent)
2020-04-17Oliver KruseB1A5BC5A1B8889D15602753
Verified
No proof (small exponent)
2021-03-28mikrB1A5BC5A1B8889D16466453
Verified
No proof (small exponent)
2021-03-29Chad Steenerson B1A5BC5A1B8889D16408453
History
DateUserTypeResult
2025-03-20masserNF-PP1Start=133/29, B1=1000000000, B2=999000000000
2025-03-12masserNF-PP1Start=6/5, B1=1000000000, B2=999000000000
2025-03-03masserNF-PP1Start=2/7, B1=1000000000, B2=999000000000
2023-08-06-anonymous-NF-PM1B1=38000000000, B2=159095079570076650
2021-08-02ViliamFNF-PM1B1=500000000, B2=90500000000
2021-03-29Chad Steenerson C-PRPM6449/51593/978611385679/12634612147559/338460971146505953/193913738231603937059741414167261465069847/88668136520858285753879468333751843293163309156062519 : B1A5BC5A1B8889D1
2021-03-28mikrC-PRPM6449/51593/978611385679/12634612147559/338460971146505953/193913738231603937059741414167261465069847/88668136520858285753879468333751843293163309156062519 : B1A5BC5A1B8889D1
2021-03-28Ryan PropperF-ECMFactor: 88668136520858285753879468333751843293163309156062519
2020-04-17Oliver KruseC-PRPM6449/51593/978611385679/12634612147559/338460971146505953/193913738231603937059741414167261465069847 : B1A5BC5A1B8889D1
2017-10-02kkmrkkblmbrbkC-PRPM6449/51593/978611385679/12634612147559/338460971146505953/193913738231603937059741414167261465069847 : 5972DFD2CD79A60B
2017-09-25George WoltmanC-PRPM6449/known_factors : 5972DFD2CD79A60B
2017-09-20kkmrkkblmbrbkC-PRPM6449/51593/978611385679/12634612147559/338460971146505953/193913738231603937059741414167261465069847 : 5972DFD2CD79A60B
2016-11-24kkmrkkblmbrbkF-ECMFactor: 193913738231603937059741414167261465069847