The book is now available! 21
(just those submitted by Silva)
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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 'Silva': (Click here to show all)

+ 21 repeated twenty-one times, following 1, forms a smoothly undulating palindromic prime. [Silva]

+ 21 followed by its reversal, plus/minus one, are twin primes. The first integer with that property. [Silva]

(There are 3 curios for this number that have not yet been approved by an editor.)

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