Use Ord7 to find the largest power of 7 dividing 52!

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I don't know what Ord7 is, but in 52! there is floor(52/49)=1 multiple of 7^2=49, and floor(52/7)=7 multiples of 7 (including 49), so that makes 8 factors of 7. Is that what you were looking for?

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