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M18

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M18
Prime class :
Type : Mersenne prime
Formula : Mn = 2n - 1
Prime data :
Rank : 18
n-value : 3,217
Number : 259117086013...362909315071
Digits : 969
Perfect number : 23,216 • (23,217-1)
Digits : 1,937
Discovery data :
Date of Discovery : 1957-09-08
Discoverer : Hans Riesel
Found with : Lucas-Lehmer test / BESK

M18 is the 18th known Mersenne prime 23,217-1 found on 1957-09-08 by Hans Riesel.

See also