OFFSET
1,1
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
Peter Alfeld The 10,000 smallest prime numbers.
EXAMPLE
233 is a prime concatenated from the primes 2,3 and 3
2311 is a prime concatenated from the primes 2,3 and 11
MATHEMATICA
Select[23*10^IntegerLength[#]+#&/@Prime[Range[200]], PrimeQ] (* Harvey P. Dale, Jun 09 2013 *)
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
Parthasarathy Nambi, Dec 14 2004
EXTENSIONS
Extended by Ray Chandler, Dec 22, 2004
STATUS
approved