The book is now available! 5897
(just those submitted by Melo)
Prime Curios!
Curios: Curios Search:
 

Participate:
Share

Just showing those entries submitted by 'Melo': (Click here to show all)

+ 5897 is prime. Keller, Buell, and Young found that
5897 * 222619 + 1 is prime, but
5897 * 2n + 1 is composite for 0 < n < 22619.
Yura found that
5897 * 2111491 + 1 is prime.
Note that both 22619 and 111491 are the smaller members of twin prime pairs. [Melo]




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