Fortunate number
= Fortunate number
{wiki=Fortunate_number}
A Fortunate number is a concept from number theory that refers to a positive integer \\( n \\) such that \\( n + 1 \\) is either a prime number or is a prime power (a number of the form \\( p^k \\) where \\( p \\) is a prime and \\( k \\) is a positive integer). Essentially, the Fortunate numbers are obtained by adding 1 to the numbers in the sequence of primes or prime powers.