The book is now available! 155
(another Prime Pages' Curiosity)
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

+ 22 + 3! + 5! + 72 - 11 - 13 = 155. [Russ]

+ 155 is the only three-digit number such that 155^155-155+1 is prime. [Opao]

+ The sum of primes between smallest and largest prime factor of itself. [Post]

+ 155 = prime(1+5+5) * pi(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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