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
6761
Composite, with 3 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
26340857824.7old
367653510742653244736409706907065734111.5old
54541294690103925735113007878812401371339128.72016-12-24 01:06:08
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
50440000002545 / 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
Verified
No proof (small exponent)
2017-09-20kkmrkkblmbrbkD3FB36739EB70F6B3013
Verified
No proof (small exponent)
2017-09-25George WoltmanD3FB36739EB70F6B3104713
Verified
No proof (small exponent)
2017-10-02kkmrkkblmbrbkD3FB36739EB70F6B3013
Verified
No proof (small exponent)
2020-04-17Oliver KruseD2C9F5D1B4B4CC263357353
Verified
No proof (small exponent)
2024-02-03Wentao HuangD2C9F5D1B4B4CC263351553
History
DateUserTypeResult
2025-03-22masserNF-PP1Start=127/67, B1=1000000000, B2=999000000000
2025-03-14masserNF-PP1Start=6/5, B1=1000000000, B2=999000000000
2025-03-05masserNF-PP1Start=2/7, B1=1000000000, B2=999000000000
2024-02-03Wentao HuangC-PRPM6761/26340857/3676535107426532447364097069070657/545412946901039257351130078788124013713 : D2C9F5D1B4B4CC26
2023-08-13-anonymous-NF-PM1B1=36000000000, B2=144600212653396500
2021-12-18Oliver KruseNF-PM1B1=1000000000, B2=1080854750315340
2020-04-17Oliver KruseC-PRPM6761/26340857/3676535107426532447364097069070657/545412946901039257351130078788124013713 : D2C9F5D1B4B4CC26
2017-10-02kkmrkkblmbrbkC-PRPM6761/26340857/3676535107426532447364097069070657/545412946901039257351130078788124013713 : D3FB36739EB70F6B
2017-09-25George WoltmanC-PRPM6761/known_factors : D3FB36739EB70F6B
2017-09-20kkmrkkblmbrbkC-PRPM6761/26340857/3676535107426532447364097069070657/545412946901039257351130078788124013713 : D3FB36739EB70F6B
2016-12-24kkmrkkblmbrbkF-ECMFactor: 545412946901039257351130078788124013713