100000000 was a number.
Gorgos was 100,000,000 light-years from Earth. (TV: Eye of the Gorgon [+]Loading...["Eye of the Gorgon (TV story)"])
According to the Fifth Doctor, dinosaurs existed for a "hundred million years or so". (TV: Earthshock [+]Loading...["Earthshock (TV story)"])
A hundred million Minyans lived on Minyos at the time the Timonic Fusion Device was tested, killing them all. (AUDIO: The Inquiry [+]Loading...["The Inquiry (audio story)"])