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GIMPS has discovered a new largest known prime number: 2^{82589933}1 (24,862,048 digits) R_{19}19! is the largest positive number of form R_{m}m! that is prime. It is the only such emirp and case where m, R_{m}, and R_{m}m! are all primes. [Loungrides]
(There is one curio for this number that has not yet been approved by an editor.)
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