Sun Zhihong

{{family name hatnote|Sun|lang=Chinese}}

{{Short description|Chinese mathematician}}

{{BLP primary sources|date=November 2017}}

Sun Zhihong ({{zh|c=孙智宏|p=Sūn Zhìhóng|w=Sun Chihhung}}, born October 16, 1965) is a Chinese mathematician, working primarily on number theory, combinatorics, and graph theory.

Sun and his twin brother Sun Zhiwei proved a theorem about what are now known as the Wall–Sun–Sun primes that guided the search for counterexamples to Fermat's Last Theorem.