| Mn | Status | Details | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fermat F28 | Composite: 1 known prime factor | ||||||||||||
| Factored |
| ||||||||||||
| ECM |
Estimated T-Level: 26.0 ⓘ TF below 2^81 is very unlikely to find new factors due to ECM effort. | ||||||||||||
| History |
| ||||||||||||
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996
GIMPS
Finding World Record Primes Since 1996