All Whispering Roots

When randomizing the order of obtain All Whispering Roots, the number of possible unique permutations is given by:

15! = 15 × 14 × 13 × … × 2 × 1

The total number of possible permutations is:

15! = 1,307,674,368,000

Built by Marclap. The source code is available on Github.