Here’s a useful LaTeX command that I learned about recently: \underbrace.
It does what it sounds like it does. It puts a brace under its argument.
I used this a few days ago in the post on the new prime record when I wanted to show that the record prime is written in hexadecimal as a 1 followed by a long string of Fs.
The code that produced is
1\underbrace{\mbox{FFF \ldots FFF}}_\mbox{{\normalsize 9,308.229 F's}}
The sizing is a little confusing. Without \normalsize the text under the brace would be as large as the text above.
Cool! I’m a LaTeX newbie, and I’m often impressed by the cool things it can do.
I assume you’re not actually finding a fractional .229 F somewhere in that prime, and you actually meant 9,308,229 – right? :)
The mix of comma and point in what is supposed to be an integer is a mistake, I suppose.