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GIMPS has discovered a new largest known prime number: 2^{82589933}1 (24,862,048 digits) Concatenate the first two prime factors of 138 to get the third. [Cramer] 138 is the only threedigit number m such that (m) and prime(m) are palindromic numbers. [Firoozbakht] Arithmetic mean of the first eighteen emirps. [Bajpai]
(There are 4 curios for this number that have not yet been approved by an editor.)
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