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M2
| M2 | |
|---|---|
| Prime class : | |
| Type : | Mersenne prime |
| Formula : | Mn = 2n - 1 |
| Prime data : | |
| Rank : | 2 |
| n-value : | 3 |
| Number : | 7 |
| Digits : | 1 |
| Perfect number : | 22 • (23-1) |
| Digits : | 2 |
| Discovery data : | |
| Date of Discovery : | c. 430 BCE |
| Discoverer : | Ancient Greek mathematicians |
