| Mn | Details | |||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2561771 | Composite, with 1 known prime factor. Cofactor is composite. Trial Factored to 268 TF target 263 | |||||||||||||||||||||||||||
| Factored |
| |||||||||||||||||||||||||||
| ECM |
Estimated T-Level: 21.6 ⓘ TF below 2^67 is very unlikely to find new factors due to ECM effort. | |||||||||||||||||||||||||||
| PRP Cofactor |
| |||||||||||||||||||||||||||
| History |
| |||||||||||||||||||||||||||
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996
GIMPS
Finding World Record Primes Since 1996