10000 was a number.
Attempting to impress Rose Tyler, the Ninth Doctor took the TARDIS ten thousand years through the Time Vortex from 2005 to 12005, the time of the New Roman Empire. They did not exit the TARDIS in this time, however, as the Doctor took the TARDIS even further to the year 5,000,000,000. (TV: The End of the World)
Both the planet Crimson Heart and the Orpheus constellation were ten thousand light-years from Earth. (TV: Death of the Doctor, Aeolian)
UNIT dropped a Shakri cube out of a helicopter at 10,000 feet to test their incredible strength. (TV: The Power of Three)
The Logistomancer was foreseer of A32K for ten thousand years. (PROSE: Cat's Cradle: Time's Crucible)
The Citadel of the Fleet housed supercomputers containing the knowledge of 10,000 star systems. (PROSE: The Secret in Vault 13)
The Sontaran Medal of Pacification was awarded to Sontaran regiments who had killed over 10,000 alien lifeforms. (PROSE: The Eight Doctors)
Handrel claimed that a single incarnation of a Time Lord could live for around ten thousand years. (PROSE: The Time Lord's Story)