The book is now available! 19421
(another Prime Pages' Curiosity)
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

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19421 is the lowest number that can be added to the quadratic n^2+n such that the expression will never give a number divisible by any prime from 2 to 41. [Atwood]


  Submitted: 2018-08-09 19:46:13;   Last Modified: 2018-08-09 19:48:23.

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