The book is now available! 13
(just those submitted by Thorn)
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 'Thorn': (Click here to show all)

Photo credit: Patrick Kik
+ Can you find a total of 13 triangles in this figure? [Thorn]

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