A 23-year-old amateur mathematician used ChatGPT Pro to solve a 60-year-old math problem, known as an Erdős problem, by asking the AI to provide a proof. The problem concerns special sets of whole numbers, and the AI's solution used a new method that had not been thought of by humans before. Experts believe this solution may have broader applications in mathematics. The amateur mathematician had no advanced mathematics training and was able to solve the problem with the help of the AI.