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
1297
Composite, with 3 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
120973920133131443.5old
648739641994444971755.8old
8002586889568704196635947159698117157026816635793674192491359195.72014-05-22 16:36:12
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000040830 / 40830
60260000000105362 / 105362
6580000000075229 / 194238
Estimated T-Level: 61.9 ⓘ
TF below 2^201 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Verified
No proof (small exponent)
2017-09-27Oliver Kruse99F91E3D7D7EF4AD3013
Verified
No proof (small exponent)
2017-10-09Chang Chia-Tche99F91E3D7D7EF4AD3013
Verified
No proof (small exponent)
2017-10-12kkmrkkblmbrbk99F91E3D7D7EF4AD3123913
Verified
No proof (small exponent)
2020-04-17Oliver Kruse48EB49ACA86A0E4B3112553
Verified
No proof (small exponent)
2020-08-12_p95holder_48EB49ACA86A0E4B332053
History
DateUserTypeResult
2021-07-19ViliamFNF-PP1Start=2/7, B1=1000000000, B2=221000000000
2021-03-27nordiNF-PM1B1=1000000000000, B2=2232843418649129478
2020-08-12_p95holder_C-PRP
M1297/12097392013313/64873964199444497/80025868895687041966359471596981171570268166357936741924913 : 48EB49ACA86A0E4B
2020-04-17Oliver KruseC-PRP
M1297/12097392013313/64873964199444497/80025868895687041966359471596981171570268166357936741924913 : 48EB49ACA86A0E4B
2017-10-12kkmrkkblmbrbkC-PRPM1297/12097392013313/64873964199444497/80025868895687041966359471596981171570268166357936741924913 : 99F91E3D7D7EF4AD
2017-10-09Chang Chia-TcheC-PRPM1297/known_factors : 99F91E3D7D7EF4AD
2017-09-27Oliver KruseC-PRPM1297/12097392013313/64873964199444497/80025868895687041966359471596981171570268166357936741924913 : 99F91E3D7D7EF4AD
2017-09-25csabaC-PRPM1297/known_factors : 99F91E3D7D7EF4AD
2016-09-07kkmrkkblmbrbkNF-PM1B1=1000000000, B2=100000000000, E=12
2014-05-22-anonymous-F-ECMFactor: 80025868895687041966359471596981171570268166357936741924913
2009-10-25Carsten KossendeyF-PM1Factor: 784805776378313347839028588561
2005-01-20-anonymous-F-PM1Factor: 64873964199444497
2005-01-20-anonymous-F-PM1Factor: 12097392013313
2000-02-01-anonymous-F-PM1Factor: 12097392013313
1999-05-02-anonymous-F-PM1Factor: 12097392013313
1999-03-26-anonymous-F-PM1Factor: 12097392013313
1999-02-07-anonymous-F-PM1Factor: 12097392013313