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

+ 338 (base 10) = 101010010 (base 2). Read backwards, 010010101 (base 10) is prime. [Henderson]

+ The least integer for which the number of divisors and the sum of its prime factors are both perfect numbers. [Post]

(There are 2 curios for this number that have not yet been approved by an editor.)

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