number
Wagstaff number
An integer of the form (2^p + 1)/3 for an odd prime p. Not a Mersenne prime as 2^p − 1 alone, and not a repunit as all ones alone.
number
An integer of the form (2^p + 1)/3 for an odd prime p. Not a Mersenne prime as 2^p − 1 alone, and not a repunit as all ones alone.