> And there's maybe 20-25 mathematics professors at each university. Yitang Zhang is not a professor, he is a lecturer [1][2]. A quick seach on Google Scholar

> And there's maybe 20-25 mathematics professors at each university. Yitang Zhang is not a professor, he is a lecturer [1][2]. A quick seach on Google Scholar reveals that people with that name have published extremely few papers in mathematics. He doesn't seem to have a website of his own, especially one that lists his publications. I'd find it quite believable that he is relatively unknown in his field. [1] http://db.unh.edu/directories/facstaff2/getfs.asp?id=4713 http://db.unh.edu/directories/facstaff2/getfs.asp?id=4713 [2] http://www.math.unh.edu/faculty http://www.math.unh.edu/faculty