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GIMPS has discovered a new largest known prime number: 2^{82589933}1 (24,862,048 digits)
Just showing those entries submitted by 'Caldwell': (Click here to show all) It is conjectured that you can always arrange the numbers from 1 to 2n in a circle so that every pair of adjacent numbers adds to a prime. Antonio Filz called this circular permutation a Prime Circle. This prime gives one solution (starting with 10) when n = 5. [Caldwell]
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