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M18
| M18 | |
|---|---|
| Prime class : | |
| Type : | Mersenne prime |
| Formula : | Mn = 2n - 1 |
| Prime data : | |
| Rank : | 18 |
| n-value : | 3,217 |
| Number : | 259117086013...362909315071 |
| Digits : | 969 |
| Perfect number : | 23,216 • (23,217-1) |
| Digits : | 1,937 |
| Discovery data : | |
| Date of Discovery : | 1957-09-08 |
| Discoverer : | Hans Riesel |
| Found with : | Lucas-Lehmer test / BESK |
M18 is the 18th known Mersenne prime 23,217-1 found on 1957-09-08 by Hans Riesel.
