How can I find the nearest Factorial to a number? For example I know that the nearest factorial to 200 is 5! So how can I also find out the nearest factorial to another number 2864785456?
Thanks.
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Abadi Eferu
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Possible duplicate of Inverse of a factorial. – robjohn Feb 04 '19 at 10:20
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See also https://math.stackexchange.com/a/3097092/589 – lhf Feb 04 '19 at 10:21
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1I would suggest to solve $$\Gamma(x+1)=n$$ numerically and correctly round. – Peter Feb 04 '19 at 10:33