That's because she actually said "ten to the fifteen" not "ten to the fifteenth", so you have to decide if you autocorrect by removing the "the" -> "ten to fifteen" or by adding the "th" -> "ten to the fifteenth".
"Ten to the fifteen" is also correct, and in my experience more common. It's short for "ten to the power of fifteen", whereas "ten to the fifteenth" is short for "ten to the fifteenth power".
Hey, OP here - while that is also true, I think the average observer would think this number _should_ be zero. The fact that any exist at all is surprising (but the fact that only two exist is also surprising; I expected to find either zero or lots when I started the script).
If you are doing html and occasionally for other purposes foxe html editor is highly underrated. http://www.firstobject.com/dn_editor.htm