I am noob in programming, passed some harder challenges before, but maaan, it took me many-many hours to figure out, absolutely drove me crazy and felt the best when passed all tests, awesome kata. Thanks!

At first I was frustrated because I could not figure out (8 kyu, 30 minutes struggle lol), then I realised I should check on wiki.
Well, it's not a good coding challenge, but it was useful, because now I know Wilson primes is a thing.
At the end of the day this kata was still useful.

Very fun to get through :) loved this kata

Awesome Kata, thank you. At first felt like impossible, but not so long after, I managed to solve it, felt so good.

ranks can't be changed

I loved this Kata, because I knew about this conjecture before I started to learn coding, and now I could finally have fun with it. (beginner here btw)
I suggest everyone to look further into this, because it has a few interesting theories around it (e.g. in biology or in tax evasion).
Thank you for this challenge, and imo it's a 7 kyu Kata.