As we approach 3.14 (at 1:59 am?), we are preparing to celebrate all things π.

In anticipation of the day, Professor Andy Norton interviewed Professor Daniel Orr on suprising appearances of π. Did you know that π  isn't just about circles and geometry? Dr. Orr explains how π pops up in a probability problem about prime numbers.

Question: what is the probability that two whole numbers will be relatively prime (share no common factors)?

Answer: 6/π2

As Dr. Orr explains, this solution comes from the Riemann zeta function.

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