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GIMPS has discovered a new largest known prime number: 2^{82589933}1 (24,862,048 digits) 10^499+153 is the smallest 500digit prime. Note that the concatenations: 153499 is prime and 499153 is a brilliant number, i.e., 499153 = 617 x 809, with the concatenation in order of its prime factors, i.e., 617809, being a prime. [Loungrides]
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