OFFSET
1,1
LINKS
Alois P. Heinz, Table of n, a(n) for n = 1..10000
MATHEMATICA
Select[Prime[Range[4 10^3]], Complement[IntegerDigits[#], {2, 3, 9}]=={} &]
PROG
(Magma) [p: p in PrimesUpTo(300000) | Set(Intseq(p)) subset [2, 3, 9]];
CROSSREFS
KEYWORD
nonn,easy,base
AUTHOR
Vincenzo Librandi, Jul 17 2015
STATUS
approved