101 Tellessate ships is only the beginning, I've seen them from 200-300 with the majority Baseships, so don't wait to long or they will over power you......
also they will have these numbers in more the 1 fleet, look for multiple fleets and they will also open and close worm holes on you as well they will also invade your worlds so be warned... they kicked my butt a number of times as well.... they are one of the toughest to fite if you give them a chance to expand....
They will also invade your planets, not all but some of them..
good luck and good hunting