(10^n)! の桁数 d を挙げたものは以下の通り。n = 1 : d = 7n = 2 : d = 158n = 3 : d = 2568n = 4 : d = 35660n = 5 : d = 456574n = 6 : d = 5565709n = 7 : d = 65657060n = 8 : d = 756570557n = 9 : d = 8565705523n = 10 : d = 956

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