What is the greatest prime factor of 8!7! + 7!6! ?  Select the correct option:	A) 7	B) 11	C) 13	D) 17	E) 19
8!7! + 7!6! = 7!6!(8*7+1) = 7!*6!*57 = 7!*6!*3*19   The answer is 19.
<result>E</result>
What is the greatest prime factor of 8!7! + 7!6! ?