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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

+ Smallest 8-digit emirp, and smallest n-digit emirp for any n whose sum of digits is also an emirp: 1+0+0+0+0+1+6+9 = 17, whose reversal 71 is prime. Curiously, 1+7 = 8, same as the 8-digit curio. [Post]




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