@Magaso I doubt that, looks to me more like its supposed to be scientific notation (specifically the e-notation version) than short for "exponential". e-notation uses the letter e for "*10^", as opposed to being "short" for "^". The difference is that there is a secret 10 baked into the expression.
I have never seen e-notation used for other bases (although I have seen other scientific notation used), so I am unsure if e always means 10, or just the base in general. ie whether "FFe2" would mean "FF*16^2" or "FF*10^2".