The book is now available! 521
(just those submitted by Luhn)
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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 'Luhn': (Click here to show all)

+ The largest known Mersenne prime exponent of the form (2^(2^k + 1)) + 2^k + 1. [Luhn]

+ 521 is the sum of two squares (112 + 202). Note that 11 + 20 is a Mersenne prime exponent as well. [Luhn]




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