The book is now available! 37
(another Prime Pages' Curiosity)
Prime Curios!
Curios: Curios Search:

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

Single Curio View:   (Seek other curios for this number)


The smallest positive integer that is never prime when followed by a string of ones, i.e., 371, 3711, 37111, 371111, ... are all composite numbers for any number of ones. [Gaydos]


  Submitted: 2016-06-25 08:40:38;   Last Modified: 2016-08-14 16:50:01.

Prime Curios! © 2000-2019 (all rights reserved)  privacy statement