%I #6 Aug 28 2015 17:31:39
%S 7,127,55987,
%T 58301791288260114251803544692993535976160443849938371660801
%N Primes of the form Phi(7,n!), where Phi is the cyclotomic polynomial.
%H OEIS Wiki, <a href="https://oeis.org/wiki/Cyclotomic Polynomials at x=n, n! and sigma(n)">Cyclotomic Polynomials at x=n, n! and sigma(n)</a>
%t Select[Table[Cyclotomic[7, n!], {n, 0, 200}], PrimeQ]
%Y Cf. A053716, A200906, A258357, A259264, A259265.
%K nonn
%O 1,1
%A _Robert Price_, Aug 20 2015