It's randomized for each player and I block the ability to brute force any amount of digits.
For the third number, have you used the hammer?
Yes, I saw a post about the train car and got the last number and the gate is open. I know from reading this post earlier after I open the gate I'm not supposed to exit but get a final bonus puzzle. How do I get to the final puzzle and what do I gain from solving the puzzle rather than just leaving?