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 A207837 Primes of the form 5n^4 + 1. 2
 6481, 103681, 844480081, 1036800001, 55099802881, 63727534081, 115672050001, 155584800001, 307529920081, 322620641281, 425152800001, 1019640545281, 1633266996481, 1739461754881, 2489356800001, 2634683086081, 2944329626881, 5285935072081, 6360160441681 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Also primes of the form 6480*n^4+1. LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1500 MATHEMATICA Select[5 Range[1086]^4 + 1, PrimeQ] (* by definition *) PROG (PARI) for(n=1, 181, r=6480*n^4+1; if(isprime(r), print1(r", "))); (Magma) [6480*n^4+1: n in [1..181] | IsPrime(6480*n^4+1)]; CROSSREFS Cf. A207838 (values of n). Subsequence of A137530. Primes of the form k*n^(k-1)+1: A065091, A002648, A199307. Sequence in context: A190012 A087351 A104343 * A104242 A031842 A028544 Adjacent sequences: A207834 A207835 A207836 * A207838 A207839 A207840 KEYWORD nonn,easy AUTHOR Bruno Berselli, Feb 21 2012 STATUS approved

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Last modified March 22 01:15 EDT 2023. Contains 361413 sequences. (Running on oeis4.)