Binary Primes (Posted on 2004-02-18)

	Submitted by Aaron
Rating: 3.5000 (2 votes)
Solution:	(Hide)
The numbers are (10^(2n)-1)/99 but 10^(2n)-1 = (10^n-1)*(10^n+1). So the only way you'll get a prime is if one of those two factors is 99.

	Subject	Author	Date
	Puzzle Solution	K Sengupta	2022-08-27 02:20:04
	solution	Dej Mar	2011-06-22 05:56:06
	re: Another thought	WAyne	2007-09-30 06:26:58
	re: Oh god! I read the question wrong.	Brian Wainscott	2004-02-23 15:25:28
	OK I swear this is the last time!	Mitch Mullings	2004-02-22 21:01:21
	Oh god! I read the question wrong.	Mitch Mullings	2004-02-22 20:59:37
	It's me again adding to my previous entry	Mitch Mullings	2004-02-22 20:57:19
	It's me! Mwahahahaha. Okay I'll stop now.	Mitch Mullings	2004-02-22 20:54:46
	re: No Subject	Brian Wainscott	2004-02-18 19:03:50
	No Subject	e.g.	2004-02-18 15:25:11
	Second thought	Larry	2004-02-18 14:25:58
	Another thought	Brian Wainscott	2004-02-18 14:25:17
	First thought	Brian Wainscott	2004-02-18 14:20:32