OFFSET
3,1
COMMENTS
5713...20832089 is the only prime for n up to 10000.
PROG
(PARI) concattwpr(n) = { y=5; print1(5", "); forprime(x=7, n, if(isprime(x-2), y=eval(concat(Str(y), Str(x))); print1(y", ") ) ) }
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Cino Hilliard, Sep 08 2003
STATUS
approved