Please input a positive integer $($input a negative value or zero to quit$)$: $7$ The greatest factor $($not including self$)$ of this integer is: $1$ Please input a positive integer $($input a negative value or zero to quit$)$: $12$ The greatest factor $($not including self$)$ of this integer is: $6$ Please input a positive integer $($input a negative value or zero to quit$)$: $15$ The greatest factor $($not including self$)$ of this integer is: $5$ Please input a positive integer $($input a negative value or zero to quit$)$: $-1$ Bye!