The Story So Far…
Transhumanity doesn't know where Factors live or where they came from, exactly. Very rarely, evidence of Factors has been found through the Pandora gates, but usually any sign is long since dead or abandoned. Factors first made contact with Transhumanity in the Neptunian Trojans, though that particularly colony has long since moved on.
The Factors are the only intelligent alien race that transhumanity has contacted. The Factors original arrived at a Neptunian Trojan and contacted a doomsday cult.