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

Home > Just Math
Purely prime (Posted on 2013-02-19) Difficulty: 2 of 5
Twenty-one prime numbers are in arithmetic sequence with difference d. Prove that d is divisible by 9699690.

No Solution Yet Submitted by Danish Ahmed Khan    
Rating: 5.0000 (1 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
re: Just the proof (spoiler) | Comment 2 of 3 |
(In reply to Just the proof (spoiler) by Steve Herman)

But just for curiosity's sake primes in arithmetic progression can be found at http://en.wikipedia.org/wiki/Primes_in_arithmetic_progression
  Posted by Charlie on 2013-02-19 18:39:18

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 (1)
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