All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars    
perplexus dot info

Home > Numbers
Prime Central (Posted on 2008-12-10) Difficulty: 3 of 5

No Solution Yet Submitted by brianjn    
No Rating

Comments: ( Back to comment list | You must be logged in to post comments.)
Answer to part two | Comment 4 of 6 |

I discovered the same solution as Charlie and Rod, that the value for x cannot be 7 to provide ten primes.  Yet, what might be considered the best that one can do where x = 7?  In the following grid, there are eight primes and the two composite numbers 3799 and 9979.

5623
1777
8779
9979


  Posted by Dej Mar on 2008-12-10 21:48:42
Please log in:
Login:
Password:
Remember me:
Sign up! | Forgot password


Search:
Search body:
Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (3)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:
Copyright © 2002 - 2017 by Animus Pactum Consulting. All rights reserved. Privacy Information