OFFSET
2,1
PROG
(PARI) concattwprl(n) = { y=3; print1(3", "5", "); forprime(x=5, 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