%0 Journal Article %T On the first sign change in Mertens' Theorem %A Jan B¨šthe %J Mathematics %D 2015 %I arXiv %R 10.4064/aa171-2-5 %X The function $\sum_{p\leq x} \frac{1}{p} - \log\log(x) - M$ is known to change sign infinitely often, but so far all calculated values are positive. In this paper we prove that the first sign change occurs well before $\exp(495.702833165)$. %U http://arxiv.org/abs/1503.01277v2