Before revision:  This improves over the previous best lower bound of \Omega(\exp(n^{\delta/2})) valid for population sizes \mu = O(n^{1/2 - \delta}), 0 < \delta < 1/2.
After revision:  This improves over the previous lower bound of \Omega(\exp(n^{\delta/2})) valid for population sizes \mu = O(n^{1/2 - \delta}), 0 < \delta < 1/2.