The book is now available! 8621
(another Prime Pages' Curiosity)
Prime Curios!
Curios: Curios Search:

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


This is one of only 2 four-digit composite numbers which, when used as "K" in Leonhard Euler's formula for generating many primes (X^2)+X+K, in which Euler originally used K=41, yields more primes than composites for the first 1,000 integer values of X. Note that the only other 4-digit composite number to yield 50+% primes in Euler's formula is 6887. [Morse]


  Submitted: 2002-05-23 23:35:20;   Last Modified: 2008-02-27 15:35:35.

Prime Curios! © 2000-2018 (all rights reserved)  privacy statement