The book is now available! 987
(another Prime Pages' Curiosity)
Prime Curios!

Valid HTML 4.01!

Curios: Curios Search:
 

Participate:
Share
GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

+ 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]

(There is one curio for this number that has not yet been approved by an editor.)




Prime Curios! © 2000-2019 (all rights reserved)  privacy statement   (This page was generated in 0.0315 seconds.)