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GIMPS has discovered a new largest known prime number: 2^{82589933}1 (24,862,048 digits) The only Xprime of order 5. (An Xprime is a palindromic prime of n^2 digits (n, odd > 2) arranged leftright, topdown, in an nbyn array, where the digits of the two diagonals are equal to a and all the other digits are equal to b different from a). [Loungrides]
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