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M31
| M31 | |
|---|---|
| Prime class : | |
| Type : | Mersenne prime |
| Formula : | Mn = 2n - 1 |
| Prime data : | |
| Rank : | 31 |
| n-value : | 216,091 |
| Number : | 746093103064...103815528447 |
| Digits : | 65,050 |
| Perfect number : | 2216,090 • (2216,091-1) |
| Digits : | 130,100 |
| Discovery data : | |
| Date of Discovery : | 1985-09-01 |
| Discoverer : | David Slowinski |
| Found with : | Lucas-Lehmer test / Cray X-MP-24 |
