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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.
This is wrong, the loop can go to n.
Test it with "print(i)" with n=7883 for example
7883 is a prime number, this code will test every number until 7883.
the loop actually never goes beyond sqrt(n)