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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.
Apparently C# literally has any method you can think of
First time I do a oneliner and OBV someone does it shorter :D
This approach could check the same number in IsPrime twice.
FACE PALM
I can not believe I did not use modulus. Such a simple solution in which I over complicated in my code.
nice code by the way!
We think alike ;-)