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by tgandrews 5665 days ago
Project Euler is great as a programming problem when trying to improve your solutions for speed.

Also, as someone who has not touched fundamental maths in 5 years it was also a good refresher; having to think about prime numbers etc again.

A good tip I have found is to use a language that can nicely manipulate longs saving you much overhead, I chose Python because it also has some nice maths libraries.