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GIMPS has discovered a new largest known prime number: 2^{82589933}1 (24,862,048 digits) The number of ways of seating nine people around a circular table so that no one sits next to any of his neighbors in a previous seating order. [Post] The sum of the squares of the first nine odd noncomposite numbers. [Silva] The smallest prime which can be represented as a sum of two squares of a prime and its reversal (23^{2}+32^{2}). [Poo Sung]
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