1013

1013 is a common number in the universe of the The X-Files, as is the date October 13.

[edit] 1013 References

October 13 is the month and date that creator Chris Carter was born.
October 13 is the month and date that Fox Mulder was born.
It is the name of Chris Carter's production company: Ten Thirteen Productions.
The X-Files Movie was released to video on October 13, 1999.
10 minutes, 13 seconds is the amount of time into the last track of The X-Files: The Album where a hidden track begins.
DF101364 - The file number of an X-File investigating the disappearance of Colonel Robert Budahas. (TXF: "Deep Throat")
Silo 1013 was a nuclear missile silo that contained a UFO and an imprisoned Alex Krycek (TXF: "Apocrypha").
United Nations Security Council Resolution 1013: an agreement that any nation that obtains an alien lifeform must immediately eradicate it (TXF: "Musings of a Cigarette Smoking Man").
10:13 am appeared as the time stamp on chapter two of Ground Zero and on chapter twenty-two of Antibodies, both novels written by Kevin J. Anderson.
On October 13, 1973, A group of government agents made contact with a group of Greys and the Cigarette Smoking Man offered up his wife, Cassandra, to the aliens in return for an alien fetus (TXF: "One Son").
On October 13, 1995, the episode "Clyde Bruckman's Final Repose" was first aired.