A036932 Smallest n-digit prime containing only digits 1 and 5, or 0 if no such prime exists.

5, 11, 151, 1151, 11551, 115151, 1111151, 15511151, 111151511, 1111115111, 11111151551, 111111111511, 1111111155151, 11111111511151, 111111111155111, 1111111111155151, 11111111111115151, 111111111115151551

Offset

1,1

Links

Jinyuan Wang, Table of n, a(n) for n = 1..500

Mathematica

Table[SelectFirst[FromDigits/@Tuples[{1, 5}, n], PrimeQ], {n, 20}] (* Harvey P. Dale, Aug 04 2019 *)

Crossrefs

Cf. A020453, A036229, A036305.

Sequence in context: A276511 A385780 A020453 * A162252 A179388 A336623

Adjacent sequences: A036929 A036930 A036931 * A036933 A036934 A036935

Keyword

nonn,base

Author

Patrick De Geest, Jan 04 1999

Extensions

Corrected by Harvey P. Dale, Mar 19 2013

Status

approved