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M20
| M20 | |
|---|---|
| Prime class : | |
| Type : | Mersenne prime |
| Formula : | Mn = 2n - 1 |
| Prime data : | |
| Rank : | 20 |
| n-value : | 4,423 |
| Number : | 285542542228...902608580607 |
| Digits : | 1,332 |
| Perfect number : | 24,422 • (24,423-1) |
| Digits : | 2,663 |
| Discovery data : | |
| Date of Discovery : | 1961-11-03 |
| Discoverer : | Alexander Hurwitz |
| Found with : | Lucas-Lehmer test / IBM 7090 |
