I don't think this was supposed to be possible but i managed to get this score, There was a bug at the end where i carried on after the 8 rounds and just clicked stop and because of my perks they just automatically gave me 2000 points.
Viewing post in High Rollers jam comments
Wow. That is the highest score I've seen yet in the game, congratulations. I did notice a bug when I tried calculating the score myself (which was the value on the dice was set to 0, so when I checked if they were all equal with the 5 of a kind function, they all read 0 because they were unrolled, and I'd neglected to add a "if die == 0"), and I can easily fix that after the jam. Other than that, you earned a 6870 score completely fair, which is still the highest one I've seen yet (the scoring works without rolling the dice by design)! Good job, thanks again for reporting the bug, and best of luck with the rest of the jam!