Factor the number 9999598404017903
Hint #1: It has two factors.
Hint #2: Both factors contain a 9999 somewhere in them.
EDIT: Orginal Number was copied incorrectly, as Jenks noted (the last digit was a 4, should have been a 3). It is corrected now. I am subtracting 2 points from my score for posting an even number and not catching the fact that an even number might have a few more than 2 factors.