Marin Mersenne 2^P-1
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Finding World Record Primes Since 1996

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MnDetails
3761
Composite, with 3 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Assignments
AssignedUserWork TypeStage% DoneUpdatedEst CompleteExpired
2025-10-15PhyxickECM2025-10-151970-01-01
2025-10-15PhyxickECM2025-10-151970-01-01
2025-10-15PhyxickECM2025-10-151970-01-01
2025-10-15PhyxickECM2025-10-151970-01-01
2025-10-15PhyxickECM2025-10-151970-01-01
2025-10-15PhyxickECM2025-10-151970-01-01
2025-10-15PhyxickECM2025-10-151970-01-01
2025-10-15PhyxickECM2025-10-151970-01-01
2025-10-15PhyxickECM2025-10-151970-01-01
2025-10-15PhyxickECM2025-10-151970-01-01
2025-10-15PhyxickECM2025-10-151970-01-01
2025-10-15PhyxickECM2025-10-151970-01-01
2025-10-15PhyxickECM2025-10-151970-01-01
2025-10-15PhyxickECM2025-10-151970-01-01
2025-10-15PhyxickECM2025-10-151970-01-01
2025-10-15PhyxickECM2025-10-151970-01-01
2025-10-15PhyxickECM2025-10-151970-01-01
2025-10-15PhyxickECM2025-10-151970-01-01
2025-10-15PhyxickECM2025-10-151970-01-01
2025-10-15PhyxickECM2025-10-151970-01-01
Factored
FactorDigitsBitsDate
55655279825.7old
12649677821511340.2old
18788748794231340.8old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000011155 / 40830
Estimated T-Level: 51.4 ⓘ
TF below 2^166 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Verified
No proof (small exponent)
2017-09-21Oliver Kruse39DC95BB60DEB4963013
Verified
No proof (small exponent)
2017-10-12kkmrkkblmbrbk39DC95BB60DEB496323013
Verified
No proof (small exponent)
2020-04-17Oliver Kruse23CEA6131CA096883107453
Verified
No proof (small exponent)
2024-02-03Wentao Huang23CEA6131CA09688310253
History
DateUserTypeResult
2025-05-05masserNF-PP1Start=165/59, B1=2600000000, B2=2597400000000
2024-06-20masserNF-PM1B1=77000000000, B2=37089566618504400
2024-02-03Wentao HuangC-PRP
M3761/55655279/1264967782151/1878874879423 : 23CEA6131CA09688
2021-09-09Jinyuan WangNF-PM1B1=1300000000, B2=13000000000
2020-04-17Oliver KruseC-PRP
M3761/55655279/1264967782151/1878874879423 : 23CEA6131CA09688
2017-10-12kkmrkkblmbrbkC-PRPM3761/55655279/1264967782151/1878874879423 : 39DC95BB60DEB496
2017-09-21Oliver KruseC-PRPM3761/55655279/1264967782151/1878874879423 : 39DC95BB60DEB496
2017-09-21Oliver KruseC-PRPM3761/55655279/1264967782151/1878874879423 : 39DC95BB60DEB496
2009-10-25Carsten KossendeyFFactor: 70402134841625125129