The book is now available! 420
(another Prime Pages' Curiosity)
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

+ 420 is the smallest argument for which Euler's prime generating polynomial p(n)=n^2+n+41 has more than two prime factors. p(420)=176861=71*53*47. For all smaller arguments, p(n) is either prime or semiprime. [Pfoertner]

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