Add unique messages to "interesting" numbers

[tolik518]

As the bot is called factorion, one could notify the user that they have just calculated a factorion. https://en.wikipedia.org/wiki/Factorion

But there is probably also more interesting stuff.

[farazmirzax]

Hey @tolik518, I would love to work on this issue, Please assign it to me under Hacktoberfest!

[tolik518]

@farazmirzax feel free to give it a go!

Please take a look at the CONTRIBUTING.md and if you use LLMs, you should understand everything you commit and why the LLMs did that it did

[Aras14HD]

Ones up to 10 are listed on Wikipedia, I calculated all under 2^32. If we add beyond base 10, we should probably add, in which base they are.

4: 13
5: 144
6: 41, 42
9: 62558
10: 145, 40585
11: 26, 48, 40472
13: 519326767

Copying this in here from the comment in the now closed pull.