The book is now available! 2293
(another Prime Pages' Curiosity)
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+ The smallest number k for which there is no known prime of the form k*2n-1.

+ In the fictional Star Trek universe, the location of Rigel in the Milky Way Galaxy was first depicted on a Federation star chart in 2293.

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

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