The book is now available! 99
(another Prime Pages' Curiosity)
Prime Curios!
Curios: Curios Search:
 

Participate:
Share
+ There are 9 ways to express 99 as p + 2q, where p and q are prime. [Hodges]

+ The 99th prime plus (9+9) is the next prime.

+ 99 = pi( prime(9)*prime(9) ). Note that 99 is the only two-digit number with this property. [Firoozbakht]

+ 99!/pi(99)! + 1 is prime. [Firoozbakht]




Prime Curios! © 2000-2017 (all rights reserved)