A261535 Primes of the form Phi(8,n!), where Phi is the cyclotomic polynomial.

2, 17, 1297, 331777, 1503561738404723998944447273369600000001

Offset

1,1

Comments

a(6) is 730 digits.

Links

Table of n, a(n) for n=1..5.

OEIS Wiki, Cyclotomic Polynomials at x=n, n! and sigma(n)

Mathematica

Select[Table[Cyclotomic[8, n!], {n, 0, 200}], PrimeQ]

Prog

(PARI) for(n=1, 500, if(isprime(k=polcyclo(8, n!)), print1(k", "))) \\ Altug Alkan, Nov 16 2015

Crossrefs

Cf. A123865, A200906, A259264, A259265, A260478.

Sequence in context: A013099 A013060 A012988 * A327020 A058233 A062635

Adjacent sequences: A261532 A261533 A261534 * A261536 A261537 A261538

Keyword

nonn

Author

Robert Price, Aug 28 2015

Status

approved