Niiice! What did you use to get that score?
I used the Golians. My strat revolved around doing research until I got either the resource reveal or war techs. After which I colonize as fast and hard as possible.
I got lucky that run and got universities as my first tech so I had high science production for my first planet.
I finished the game on turn 100 using the Genetic Ascendance.
Honestly have no clue if I could go higher but it feels like I only missed only a couple possible points.