What is the product over all of the primes p of:

(p^2+1)/(p^2-1) ?

That's a constant that requires EVERY prime in order

to calculate it.

It turns out to be 5/2. Which is not irrational.

On 2/13/2013 9:15 AM, Kermit Rose wrote:

> I expected the twin prime constant to be irrational

> because I expected that any constant

> that requires EVERY prime in order to calculate it,

>

> would necessarily be irrational.

>

> Kermit Rose

>

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