Personal experience: I stopped at a point where brute-forcing started to feel "unwelcomed", I think it was this one: https://martin-ueding.de/posts/project-eule

Personal experience: I stopped at a point where brute-forcing started to feel "unwelcomed", I think it was this one: https://martin-ueding.de/posts/project-euler-solution-66-diophantine-equation/ https://martin-ueding.de/posts/project-euler-solution-66-dio...