User blog comment:King2218/Count to "infinity"!/@comment-92.242.58.12-20140923065235

By my calculations - and assuming we won't slow down too much - we'd only make less than 20000 additions before we reach a point where n>10^a.

In other words, somewhere between 25<=a<30 we'll start jumping over powers of 10 very quickly. As in "by double that number additions we'd be somewhere around E5#3" very quickly.