From June 27 to June 29, 2023, A. Kumar was a guest at the Department of Mathematics for a three-day research internship, which he received as a special prize in the state competition jugend forscht for a paper in the area of analytic number theory. During his stay there were opportunities for discussions about his work. In addition, he was able to attend several lectures and experience the work at the university live. A visit to the computer museum rounded off the visit.