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M15

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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.

See also