Not a school 42 student here - I just switch to whichever loop I feel is appropriate.

Are you school 42 student? They use mostly whiles. :)

I added a Crystal translation.

Two weeks, but I learned a lot about Java. Great kata.

30 bits is already enough for that. some languages have beefed up tests already.

awesome except for the int overflow

  < Incorrect Result >
     number = 84026   
     Submitted: -500033480
     Expected:  1647450168

done, but the description's markdown code is starting to be really bloated...

Very nice indeed

It's not as hard as you think, and the clues are there. Nice kata.

Very concise.

C++ yes

No parameter is needed for #split

yes. Like... well, "infinite". ;)