A207837 Primes of the form 5*k^4 + 1.
6481, 103681, 844480081, 1036800001, 55099802881, 63727534081, 115672050001, 155584800001, 307529920081, 322620641281, 425152800001, 1019640545281, 1633266996481, 1739461754881, 2489356800001, 2634683086081, 2944329626881, 5285935072081, 6360160441681
Offset: 1
Links
- Vincenzo Librandi, Table of n, a(n) for n = 1..1500
Crossrefs
Programs
-
Magma
[6480*n^4+1: n in [1..181] | IsPrime(6480*n^4+1)];
-
Mathematica
Select[5 Range[1086]^4 + 1, PrimeQ] (* by definition *)
-
PARI
for(n=1, 181, r=6480*n^4+1; if(isprime(r), print1(r", ")));
Formula
a(n) = 5*A207838(n)^4 + 1. - Paul F. Marrero Romero, Dec 07 2023
Comments