The book is now available! 29
(just those submitted by Green)
Prime Curios!
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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 'Green': (Click here to show all)

+ The maximal number of regions into which a circle can be divided by 7 lines. [Green]

+ The membership of the Mathematical Association of America is divided into 29 regional sections. [Green]

+ The smallest prime p such that when its digits are rendered in the base p, the result is prime. In this case 29 (base 29) = 67. [Green]

+ All ZIP Codes in the state of South Carolina begin with the digits '29'. [Green]


Version 3 of the QR Code (Quick Response Code) uses a
29-by-29 array of black squares on a white background to
encode messages. QR Codes are often scanned by smart
phones for the purpose of linking to a website whose URL
is encoded in the array of black and white squares. In this
case the encoded URL is,
the homepage of Prime Curios!.

(There is one curio for this number that has not yet been approved by an editor.)

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