Kata

your code is missing something explicit from the directions

In order for your answer not to be too messy (hyperfactorial of 100 is 9015 digits long) give the answer modulo 1000000007.

You forgot to apply the modulo.

ah shit. You are right, thanks a lot!

Approved

@okabe - based on @Unnamed 's comment, if you'd like to use LaTeX formatting in your markdown, here is the LaTeX markdown corresponding to the description as it appears on the Wikipedia article - feel free to copy it if you want:

The hyperfactorial of a positive integer $nn$ is the product of the numbers $1^1,2^2,\mathrm{.}\mathrm{.}\mathrm{.},n^{n}1^1\; ,\; 2^2,\; ...,\; n^n$:

$H(n)=1^1\times 2^2\times 3^3\times \mathrm{.}\mathrm{.}\mathrm{.}\times (n-1{)}^{n-1}\times n^{n}H(n)\; =\; 1^1\; \backslash times\; 2^2\; \backslash times\; 3^3\; \backslash times\; ...\; \backslash times\; (n-1)^\{n-1\}\; \backslash times\; n^n$

$H(n)={\prod }_{i=1}^n{i}^{i}H(n)\; =\; \backslash prod\_\{i=1\}^\{n\}\; i^i$

Source markdown for the above, in case it's easier to copy paste:

The hyperfactorial of a positive integer `$n$` is the product of the numbers `$1^1 , 2^2, ..., n^n $`:

`$H(n) = 1^1 \times 2^2 \times 3^3 \times ... \times (n-1)^{n-1} \times n^n$`

`$H(n) = \prod_{i=1}^{n} i^i $`

@benjaminzwhite Much thanks!