perplexus.info :: Probability : Random Primes

Random Primes (Posted on 2003-07-10)

If you pick any two integers at random, what is that probability that they will be relatively prime? ("relatively prime" means that the two numbers share no divisors except 1)

Tell how you end up with the answer.

Submitted by not_so_einstein

Rating: 4.0000 (2 votes)

Solution: (Hide)

6/(pi^2).
DJ provides an explanation and a "more info" link here

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

Subject	Author	Date
PI is not just for circles.	Math Man	2016-04-03 17:21:41
answer	K Sengupta	2007-12-21 05:41:58
re(2): Solution	DJ	2003-07-14 05:43:21
re: Solution	Charlie	2003-07-14 03:08:54
Solution	DJ	2003-07-13 20:54:54
re(2): First steps....	Charlie	2003-07-10 08:30:26
solution	Charlie	2003-07-10 08:24:24
re: First steps....	friedlinguini	2003-07-10 08:20:52
First steps....	fwaff	2003-07-10 08:00:37

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