> His user+date+mersenne salt accomplishes the goal of (mildly) increasing the cost of precomputed attacks. Most password crackers these days are using GPUs an

> His user+date+mersenne salt accomplishes the goal of (mildly) increasing the cost of precomputed attacks. Most password crackers these days are using GPUs and don't even bother with precomputed rainbow tables. So the salt is not increasing their cost at all.