The book is now available! 987
(just those submitted by Opao)
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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 'Opao': (Click here to show all)

+ 987 is the only 3-digit number with consecutively decreasing digits such that when multiplied by the sum of its digits plus and minus one, the results are primes. I.e., 987*(9+8+7)-1 and 987*(9+8+7)+1 are primes. [Opao]




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