The book is now available! 7777777777
(just those submitted by Patterson)
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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 'Patterson': (Click here to show all)

+ 7777777777 is the only ten-digit repdigit such that the product of itself and all truncations of itself minus two is prime. I.e., 7777777777*777777777*77777777*7777777*777777*77777*7777*777*77*7 - 2 is prime. [Patterson]

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