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 F13Composite: 4 known prime factors
Factored
FactorDigitsBitsDate
27109546393611341.31974
26638488771521413131961.21991-01-05
36031098445422919691961.61991-05-09
3195460208205516432206725132788.01995-06-16
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000040830 / 40830
60260000000105362 / 105362
6580000000058461 / 194238
Estimated T-Level: 61.5 ⓘ
TF below 2^199 is very unlikely to find new factors due to ECM effort.
Assigned
AssignedUserWork TypeStage% DoneUpdatedExpired
2025-09-181144551144factor ECM smallC1S11.14 % 2025-09-21
History
DateUserTypeResult
2025-03-25Anton RepkoNF-PM1
B1=16000000000000, B2=18001361365110092970
2021-08-27H MichaelsonNF-PP1
Start=156/17, B1=1000000000, B2=100000000000
2021-05-01ATHNF-PP1
Start=6/5, B1=5000000000, B2=300000000000
2021-04-22ATHNF-PP1
Start=2/7, B1=2000000000, B2=200000000000