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]

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