|
%I #9 Jun 07 2016 16:26:45
%S 6,10,14,22,26,27,30,34,38,45,46,58,62,74,82,86,94,106,118,122,134,
%T 142,146,153,155,158,166,170,178,182,189,194,202,206,214,215,218,226,
%U 231,254,262,274,278,287,297,298,302,314,323
%N Numbers n such that 2^(n-1) mod n is a prime number.
%C Numbers n such that A062173(n) is prime.
%H Harvey P. Dale, <a href="/A175168/b175168.txt">Table of n, a(n) for n = 1..1000</a>
%F A062173(a(n))=A000040(k).
%t Select[Range[323], PrimeQ[Mod[2^(#-1), #]] &]
%t Select[Range[350],PrimeQ[PowerMod[2,#-1,#]]&] (* _Harvey P. Dale_, Jun 07 2016 *)
%Y Cf. A000040, A062173.
%K nonn
%O 1,1
%A _Juri-Stepan Gerasimov_, Dec 02 2010
|
