User blog:Cloudy176/My number is smaller!

There seem to be some blog-driven large number competitions (like My number is bigger!) out there. So here's mine (sort of):

My number is smaller!

The goal of this competition is to post a smaller (but as large as you could) number than the previous poster's number. It's like a large number competition, but in reverse.

The rules are:


 * 1) You can't use the most dominant function used at the preceding entry. Using functions used at 2 or more entries before (including alternating between two functions) is okay, though.
 * 2) The smaller the difference between your number and the previous one, the better.
 * 3) Complicated things and salad numbers may be allowed.
 * 4) Define your functions and notations. (A link to a page on this wiki or an external source is sufficient.)

I'll start with Rayo(10100-1).

Post your numbers in the comments to participate!