The book is now available! 241
(just those submitted by Honaker)
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

Just showing those entries submitted by 'Honaker': (Click here to show all)

+ The smallest prime of form n!+239. The sequence begins 241, 263, 359, 5279, etc., and its 22nd term is arguably the most interesting! [Honaker]

+ 241 = (22^2-2)/2. Can you find the next prime of form (t^2-2)/2, where t is a repdigit of form 2*(10^n-1)/9? [Honaker]

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