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M5
| M5 | |
|---|---|
| Prime class : | |
| Type : | Mersenne prime |
| Formula : | Mn = 2n - 1 |
| Prime data : | |
| Rank : | 5 |
| n-value : | 13 |
| Number : | 8191 |
| Digits : | 4 |
| Perfect number : | 212 • (213-1) |
| Digits : | 8 |
| Discovery data : | |
| Date of Discovery : | 1456 |
| Discoverer : | anonymous |
| Found with : | Trial factoring |
