Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
Fermat F17Composite: 2 known prime factors
Factored
FactorDigitsBitsDate
310650376028171444.81978-05
775106109980252258935896705839288692269358042316949162.42011-03-15
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000040830 / 40830
6026000000038540 / 105362
Estimated T-Level: 56.8 ⓘ
TF below 2^184 is very unlikely to find new factors due to ECM effort.
P-1 factors
DateFactorB1B2
2025-07-29775106109980252258935896705839288692269358042316910000000000001200190347211906048
History
DateUserTypeResult
2025-07-29Anton RepkoF-PM1
Factor: 7751061099802522589358967058392886922693580423169 / (P-1, B1=1000000000000, B2=1200190347211906050)
2021-05-01ATHNF-PP1
Start=6/5, B1=400000000, B2=40000000000
2021-04-23ATHNF-PP1
Start=2/7, B1=200000000, B2=20000000000
2014-04-27chargerF-ECM
Factor: 31065037602817
2011-03-14BuckleF-ECM
Factor: 7751061099802522589358967058392886922693580423169