OFFSET
1,1
LINKS
Seiichi Manyama, Table of n, a(n) for n = 1..10000
MATHEMATICA
Select[Range[500], PrimeQ[FromDigits[Join[{5}, IntegerDigits[#]]]]&] (* Harvey P. Dale, Mar 23 2012 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, May 15 1998
STATUS
approved