The book is now available! 65281
(just those submitted by Yosei)
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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 'Yosei': (Click here to show all)

+ 65281 is the smallest strong pseudoprime to base 16 with an even reciprocal period when written in hexadecimal. There is no other such number < 1.2*10^6. Note, we need only 4 different digits (0,1,e,f) to write this: 1/ff01 = 0.000100fffeff 000100fffeff... . [Yosei]




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