What is this product?

[zak seidov]

It's about 0.56,
Zak

--- David Wilson <davidwwilson at comcast.net> wrote:

> What is PROD(prime p; ((p-1)/p)^(1/p))?  Is it 0 or
> positive?
> 
> It might be interpreted as the expected value of
> phi(n)/n for very large n.



 
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