4500000000 was a number.

Ohila believed that the Twelfth Doctor had spent four and a half billion years trapped in the confession dial. (TV: Hell Bent) According to the Veil's own logs, the Doctor more precisely broke out of the confession dial on the 43rd day of his 4500000003rd year in the dial. (PROSE: The Veil)

Community content is available under CC-BY-SA unless otherwise noted.