dnc

package

v0.33.0 Latest Latest Go to latest Published: Oct 29, 2025 License: MIT Imports: 3 Imported by: 0

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var (
	// Mod is the global digit mask. Don't change this. Unless you hate yourself.
	Mod = 10000000
)

func Factorial(n int) int

Factorial returns the low-order log10(Mod) non-zero digits of n!

func FactorialEven(n int) int

FactorialEven returns k where 2^k*m*5^? = n!

func Fix(f, twos, fives int) int

Fix returns (f*2^(twos-fives))%Mod if twos > fives else (f*2^(fives-twos))%Mod (i.e., it puts back the excess 2's or 5's that multiply removed)

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