A032716 Numbers k such that k prefixed by '8' and followed by '3' is prime.

2, 5, 6, 8, 12, 23, 24, 26, 27, 29, 35, 36, 42, 44, 51, 54, 56, 57, 62, 66, 69, 71, 75, 78, 80, 86, 89, 92, 93, 96, 101, 102, 104, 108, 116, 117, 120, 122, 123, 128, 129, 134, 135, 137, 146, 153, 155, 156, 170, 177, 185, 188, 194, 195, 197, 200, 201, 207, 215

Offset

1,1

Links

Table of n, a(n) for n=1..59.

Mathematica

Select[Range[300], PrimeQ[FromDigits[Join[{8}, IntegerDigits[#], {3}]]]&] (* Harvey P. Dale, Aug 20 2015 *)

Crossrefs

Sequence in context: A333965 A105107 A002253 * A132229 A028750 A028787

Adjacent sequences: A032713 A032714 A032715 * A032717 A032718 A032719

Keyword

nonn,base

Author

Patrick De Geest, May 15 1998

Status

approved