|
%I #11 Apr 28 2019 18:27:12
%S 1,2,4,6,9,10,12,13,14,15,16,18,19,20,22,23,24,25,26,28,30,31,32,34,
%T 35,36,37,38,40,42,43,44,45,46,48,49,50,51,52,54,55,56,58,60,61,62,64,
%U 65,66,67,68,70,72,73,74,75,76,78,79,80,82,84,85,86,88,90,91,92
%N Numbers n whose 10's complement is not prime, i.e., 10^k-n, where k is the number of digits of n, is not prime.
%H Vincenzo Librandi, <a href="/A228359/b228359.txt">Table of n, a(n) for n = 1..1000</a>
%t Select[Range[100], ! PrimeQ[10^(IntegerLength[#]) - #]&]
%Y Cf. A228075.
%K nonn,easy,base,less
%O 1,2
%A _Vincenzo Librandi_, Aug 21 2013
|
