This number is a prime.
4583 is the smallest prime such that if F(p) = 6*p^6-1, then F(4583) and F(F(4583)) are also primes. [Opao]
4583 is the smallest prime such that if F(p) = 6*p^6-1, then F(4583) and F(F(4583)) are also primes. [Opao]