I'm proud of the 28 students for whom I was a dissertation advisor (see vita); and I know that 28 is a perfect number. So I won't be advising any more students. But I do say that if somebody solves one of the open problems stated in one of my Computer Musings, within about two or three weeks of the time I stated it, I'll sign their thesis. (After two or three weeks, I'll be working on something else and won't have time to read their work.)