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GIMPS has discovered a new largest known prime number: 2^{82589933}1 (24,862,048 digits) Using 10213 as the starting term for the RATS algorithm: Reverse Add Then Sort the digits, leads to a 72 term sequence ending with the prime 5566666666666666666667777. This is the longest sequence produced for all starting integers < 20000 using the prime stopping criterion. [Earls]
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