(x!)^(1/x) ~ x/e better: (x!)^(1/x) ~ x/e - 1.8 * ln(ln(x)) https://www.wolframalpha.com/input?i=+%28x%21%29%5E%281%2Fx%29+-%28x%2Fe+%2B+1.8+*+ln%28ln%28x

(x!)^(1/x) ~ x/e better: (x!)^(1/x) ~ x/e - 1.8 * ln(ln(x)) https://www.wolframalpha.com/input?i=+%28x%21%29%5E%281%2Fx%29+-%28x%2Fe+%2B+1.8+*+ln%28ln%28x%29%29%29%2C+x+from+0+to+1e14 https://www.wolframalpha.com/input?i=+%28x%21%29%5E%281%2Fx%...