OFFSET
1,1
COMMENTS
Or, primes that are concatenation of three 2-digit primes 98>p>q>r>10.
There are exactly 300 such primes from 292319, 311711, 311713, to 978931, 978947, 978973.
CROSSREFS
KEYWORD
fini,full,nonn
AUTHOR
Zak Seidov, Nov 27 2009
STATUS
approved