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M15
| M15 | |
|---|---|
| Prime class : | |
| Type : | Mersenne prime |
| Formula : | Mn = 2n - 1 |
| Prime data : | |
| Rank : | 15 |
| n-value : | 1,279 |
| Number : | 104079321946...703168729087 |
| Digits : | 386 |
| Perfect number : | 21,278 • (21,279-1) |
| Digits : | 770 |
| Discovery data : | |
| Date of Discovery : | 1952-06-25 |
| Discoverer : | Raphael Robinson |
| Found with : | Lucas-Lehmer test / SWAC |
M15 is the 15th known Mersenne prime 21,279-1 found on 1952-06-25 by Raphael Robinson.
