# Mertens' third theorem

> Theorem that the product of (1 - 1/p) for primes p up to n, times log(n), approaches e^(-gamma)

**Wikidata**: [Q118176628](https://www.wikidata.org/wiki/Q118176628)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Mertens'_third_theorem)  
**Source**: https://4ort.xyz/entity/mertens-third-theorem