A291998 Primes of the form Phi(k, -5), where Phi is the cyclotomic polynomial.

521, 31, 601, 19531, 12207031, 390001, 305175781, 234750601, 60081451169922001, 152587500001, 10910444855403996246103496881, 59509429687890001, 11293772630057337854244300009061892827351888021, 9080418348371887359375390001, 5465713352000770660547109750601

Offset: 1

Author

Robert Price, Sep 07 2017

Keywords

• nonn

Links

• Robert Price, Table of n, a(n) for n = 1..31
• Yves Gallot, Cyclotomic polynomials and prime numbers
• Index entries for cyclotomic polynomials,values at X

Crossrefs

Cf. A138925.

Programs

Mathematica

Select[Table[Cyclotomic[k,-5], {k, 0, 100}], PrimeQ[#] &]