[sebastiennight]

It goes like this:

"For any positive "x", is 1 x times greater than 0? Well, 0 times x is lower than 1, and 1 divided by x is larger than 0."

So his productivity increased by more than twice, more than ten times, more than a billion times, more than a googol times, more than Rayo's number. The only mathematically useful way to quantify it is to say his productivity is infinitely larger. Unless you want to settle for "can't be compared", which is less informative.