OFFSET
1,1
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
EXAMPLE
7151 is a prime obtained by prefixing a 7 to the prime 151.
MATHEMATICA
Select[FromDigits[Join[{7}, IntegerDigits[#]]]&/@Prime[Range[250]], PrimeQ] (* Harvey P. Dale, Aug 08 2014 *)
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Parthasarathy Nambi, Oct 29 2009
EXTENSIONS
a(11)-a(42) from Vincenzo Librandi, Nov 01 2009
Corrected (a(15)=7307 inserted) by Harvey P. Dale, Aug 08 2014
STATUS
approved