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Stirling's approximation of factorial
Online calculator computes Stirling's approximation of factorial of given positive integer (up to 170!)
Combinatorics – combinations, arrangements and permutations
This calculator calculates the number of combinations, arrangements and permutations for given n and m
Combinatorics. The generator of combinations.
This calculator which generates possible combinations of m elements from the set of element with size n.
Factoring calculator
This calculator generates all pairs of factors for given integer.
Combinatorics. Permutation generator from N to M with repetitions.
Combinatorics. Permutation generator from N to M with repetitions.
Combinatorics. Permutation generator from n to m without repetitions
Combinatorics. Permutation generator from n to m without repetitions
Gamma function
Calculation of the Gamma function using Lanczos approximation
Generator of combinations that satisfy a condition
For elements with weights this calculator can filter out all combinations where total weight is under the specified limit.
Factorial
This online calculator calculates factorial of a positive integer. Practically unlimited positive integer. In fact, it is limited only by the time you are willing to wait until calculation completes. I was patient enough to wait for 100000!
Tips and tricks #12: Long (infinite) calculations
This article describes how to perform long or infinite calculations while allowing user to stop them
Division of factorials
This online calculator solves factorial division problems when you have factorials in the numerator and denominator.
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