Search: id:A070157
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%I A070157
%S A070157 4,19380,9443670,11054760,15992070,22482330,32557380,51102510,57978840,
%T A070157 60549240,64671570,84045960,89757960,111316170,112821690,116433510,
%U A070157 171124380,171418650,183082350,196694760,197021160,241803240,266498460
%N A070157 n-1, n+1, 1+n^2, 1+n^4 and 1+n^8 are all prime numbers.
%e A070157 3, 5, 17, 257, 65537 are the Fermat primes; 19379, 19381, 375584401, 
               141063641523360001 and 19898950959831015581425689600000001 are primes.
%t A070157 Do[p = Prime[n] + 1; If[ PrimeQ[p + 1] && PrimeQ[1 + p^2] && PrimeQ[1 
               + p^4] && PrimeQ[1 + p^8], Print[p]], {n, 1, 115000000}]
%Y A070157 Cf. A070155, A070156.
%Y A070157 Sequence in context: A152840 A003832 A162703 this_sequence A003556 A053015 
               A089210
%Y A070157 Adjacent sequences: A070154 A070155 A070156 this_sequence A070158 A070159 
               A070160
%K A070157 nonn
%O A070157 1,1
%A A070157 Labos E. (labos(AT)ana.sote.hu), Apr 23 2002
%E A070157 Edited and extended by Robert G. Wilson v (rgwv(AT)rgwv.com), May 04 
               2002

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