“By taking the highly anomalous post IDs and filtering out the MathHelpBoards import, and filtering out instances which seem plausibly close to their actual post times, we get an estimated 115,000 posts written by LLMs and attributed to humans.”
PhysicsForums backdated about 115,000 LLM posts and put real users’ names on them. The founder is credited with 2,817 posts he never wrote. The post IDs run in order and the dates do not, which gave it away. One calculator thread is 92% machine text, with false information.