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M2

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M2
Prime class :
Type : Mersenne prime
Formula : Mn = 2n - 1
Prime data :
Rank : 2
n-value : 3
Number : 7
Digits : 1
Perfect number : 22 • (23-1)
Digits : 2
Discovery data :
Date of Discovery : c. 430 BCE
Discoverer : Ancient Greek mathematicians