perplexus.info :: Numbers : 10001, 100010001, ....

10001, 100010001, .... (Posted on 2003-05-23)

Consider the following sequence:

10001, 100010001, 1000100010001, 10001000100010001, 100010001000100010001,....

Show that none of them are prime numbers.

Submitted by Fernando

Rating: 3.3333 (6 votes)

Solution: (Hide)

Very clever solution by DJ! (I myself haden't thought of it). See it here.

Comments: ( You must be logged in to post comments.)

Subject	Author	Date
re: First observations	Ady TZIDON	2013-02-27 06:54:12
re: Infinite	Corey	2004-09-28 22:53:35
Doesn't belong here	Corey	2004-09-28 22:49:31
Infinite	Tim Axoy	2003-05-27 14:22:43
re(2): a twist, perhaps?	DJ	2003-05-25 08:16:39
re: a twist, perhaps?	DJ	2003-05-25 04:46:47
Part of the Solution - Hint	Ravi Raja	2003-05-24 05:21:04
re: a twist, perhaps? [TYPOS]	DJ	2003-05-23 20:24:46
a twist, perhaps?	DJ	2003-05-23 20:23:11
re: First observations	Gamer	2003-05-23 16:18:02
First observations	Brian Smith	2003-05-23 14:21:20
hhmmmm...	jude	2003-05-23 12:03:15

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:


perplexus dot info