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What are 'Happy Primes'?
Thursday, January 5th, 2012 01:28 amAccording to The (10th) Doctor, "Any number that reduces to one when you take the sum of the square of its digits and continue iterating it until it yields 1 is a happy number, any number that doesn't, isn't. A happy prime is a number that is both happy and prime."
Did you get all that?
