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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.
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this is how you do it without using the default prime_division method.
this is the most obvious solution but not the best algorithm.
agree, this only returns the length of the last palindrom, it doesn't guarantee longest.
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