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keisanHigh-precision calculations for everyday life and work

Numeric Search for the Inverse Factorial

Author: shiroeExecutions: 17

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Calculate the inverse factorial.
For natural numbers greater than or equal to 2, find the values of x such that x = n!.
Let M be the value of n such that x = n!.
Output the values of L, M, and H, as well as L!, M!, and H!,
such that the following inequalities hold: L < M < H and L! < M! < H!.
x
  (Enter a natural number greater than or equal to 2)
L   (n such that n! < x)
H   (n such that x < n!)
L! value 
H! value 
x   (Repeated input values)
M   (n such that x = n!)
M! values   (x should be M!)
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The values L and H are also output as a reference in case M cannot be found.
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This implementation does not use the modulus formula (related to Fermat’s Little Theorem) or the extended Euclidean algorithm.
It performs a brute-force search using a loop.
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When handling large numbers, please pay attention to the exponential display format (E) in the output field.
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Digit display set to 50 digits. The number of digits can be changed. Real number calculation mode.

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