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%I #11 Mar 09 2020 09:12:28
%S 3,11,113,3313,11113,113111,1111333,11111131,111111113,1111113313,
%T 11111111113,111111133333,1111111111333,11111111113133,
%U 111111111113113,1111111111313131,11111111111131333,111111111111111131
%N Smallest n-digit prime containing only digits 1 and 3, or 0 if no such prime exists.
%H Jinyuan Wang, <a href="/A036930/b036930.txt">Table of n, a(n) for n = 1..500</a>
%t Flatten[Table[Select[FromDigits/@Tuples[{1,3},n],PrimeQ,1],{n,18}]] (* _Harvey P. Dale_, Jul 23 2012 *)
%Y Cf. A020451, A036229, A036303.
%K nonn,base
%O 1,1
%A _Patrick De Geest_, Jan 04 1999
%E Corrected by _Harvey P. Dale_, Jul 23 2012
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