Words for numbers above 10<sup>18</sup> may be found in dictionaries or tables of number names, but are almost never used. For years, mathematicians and computer scientists have enjoyed the sort of game of inventing systems for naming large numbers, but there is no practical need to render such names as words, and it is very questionable whether any of them should be considered to be "real" words; they are usually encountered only in discussions of large numbers and number naming.