Loading collection data...
Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
I mean no matter how many times you run the test, there will be still a marginal chance that the code fails to identify whether the number is prime or composite. That is just the nature of probabilistic prime checking.