80809

This number is a prime.

The quotient in the following cryptarithmic with all but one unknown:

                      X X 8 X X
               ________________
        X X X ) X X X X X X X X
                  X X X
                    X X X X
                      X X X
                        X X X X
                        X X X X

(P. L. Chessin, Problem E1111, American Mathematical Monthly, April 1954) [Beedassy]