9767473717
This number is a prime.
The largest prime concatenated in reverse order from all
the double-digit primes ending with the same digit d,
(d=7). [Loungrides]
(There is one curio for this number that has not yet been approved by an editor.)
Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell