500 (number)

500 was a number.

The First Doctor was in possession of a Five Hundred Year Diary by the time of his regeneration into the Second Doctor. (TV: The Power of the Daleks) Shortly before he himself regenerated, the Second Doctor gave his age as a "tender" 500. (COMIC: The Brotherhood)

Gger was 500 light-years from Earth. (PROSE: Listen - The Stars)