If the expression 1000! / 77^ x

results in an integer, what is the largest possible value of x?

the answer is 48 but im not sure how, can someone please explain?

If the expression 1000! / 77^ x

results in an integer, what is the largest possible value of x?

the answer is 48 but im not sure how, can someone please explain?

Which video or quiz is this from?

I think the answer is 98?