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GIMPS has discovered a new largest known prime number: 2^{82589933}1 (24,862,048 digits) The product of the four primes in a prime quadruplet (except for 5,7,11,13) always ends in 189. [Rupinski] The 189th century would be the first to contain as few as five prime years (18803, 18839, 18859, 18869 and 18899).
(There is one curio for this number that has not yet been approved by an editor.)
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