It is a series of the form ζ(s) = ∏p prime(1-1/p^s)^(-1) exp(sum (∑p^(-ks))/k) , where s is a complex variable and the product is over all primes p.
It is a series of the form ζ(s) = ∏p prime(1-1/p^s)^(-1) exp(sum (∑p^(-ks))/k) , where s is a complex variable and the product is over all primes p.