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GIMPS has discovered a new largest known prime number: 2^{82589933}1 (24,862,048 digits) 2^{2} + 3! + 5! + 7^{2}  11  13 = 155. [Russ] 155 is the only threedigit number such that 155^155155+1 is prime. [Opao] The sum of primes between smallest and largest prime factor of itself. [Post] 155 = prime(1+5+5) * (1+5+5). It is the smallest number of this form. [Bajpai] 155 and 156 are the smallest pair of consecutive integers whose highest prime factors (31 and 13) are anagrams of each other. [Gaydos]
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