What are 'Happy Primes'?
Thursday, January 5th, 2012 01:28 am![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
icyjadexoxoAccording 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?
