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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.
No longer an issue.
Fixed, please approve!
https://www.codewars.com/kumite/638743d608488f22b0fe704e?sel=638743d608488f22b0fe704e
Not true. I changed the solutions to prove that you were wrong. No reason to change the tests.
The authors solution and the reference solution do not have isPrime function. It's not a requirement.