User:CXTests/T223375

He also proved that it equals the Euler product
 * $$\zeta(s) = \prod_{p \text{ prime}} \frac{1}{1-p^{-s}}= \frac{1}{1-2^{-s}}\cdot\frac{1}{1-3^{-s}}\cdot\frac{1}{1-5^{-s}}\cdot\frac{1}{1-7^{-s}} \cdot \frac{1}{1-11^{-s}} \cdots$$

where the infinite product extends over all prime numbers p.