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M31

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M31
Prime class :
Type : Mersenne prime
Formula : Mn = 2n - 1
Prime data :
Rank : 31
n-value : 216,091
Number : 746093103064...103815528447
Digits : 65,050
Perfect number : 2216,090 • (2216,091-1)
Digits : 130,100
Discovery data :
Date of Discovery : 1985-09-01
Discoverer : David Slowinski
Found with : Lucas-Lehmer test / Cray X-MP-24