Factorial Calculator

The *n*^{th} factorial is the product of all the numbers from 1 up to *n*. Also, factorials use the
"!" notation, so *n*! is the *n*^{th} factorial. The 4^{th} factorial would be 24 because 1
× 2 × 3 × 4 = 24. Factorials are useful for calculating how many permutations that can be made up
using a set of given objects. For example: If you have 4 different coloured boxes next to each other in a line, you
could rearrange them in 24 different orders.

**Please Note**: Browsers may have difficulty trying to display larger factorials and may possibly crash. Certain
browsers may not allow you to copy very easily, so please feel free to download larger results as a text file.

**Input Limit**: There is an input limit between **1** and **100**,**000**.

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Source last modified 561 days ago.

Not XHTML 1.0 valid or CSS3 valid.

Source last modified 561 days ago.