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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.
Very nice, but use double quotes for string interpolation only!
Look for what is a prime number. This is really basic maths. The test fails when you return true if the parameter is not a prime or false and the parameter is a prime. You can print the parameter on the console, but the way to do it depends on the language you are using.
It would be really nice if a hint on what to research was given. Im passing the test but fail the random one. Also, how do I see the parameters that fail? Am I not supposed to know what fails the test...