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A207837
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Primes of the form 5n^4 + 1.
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2
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6481, 103681, 844480081, 1036800001, 55099802881, 63727534081, 115672050001, 155584800001, 307529920081, 322620641281, 425152800001, 1019640545281, 1633266996481, 1739461754881, 2489356800001, 2634683086081, 2944329626881, 5285935072081, 6360160441681
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OFFSET
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1,1
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COMMENTS
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Also primes of the form 6480*n^4+1.
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LINKS
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Vincenzo Librandi, Table of n, a(n) for n = 1..1500
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MATHEMATICA
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Select[5 Range[1086]^4 + 1, PrimeQ] (* by definition *)
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PROG
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(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)];
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CROSSREFS
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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
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KEYWORD
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nonn,easy
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AUTHOR
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Bruno Berselli, Feb 21 2012
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STATUS
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approved
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