Gotthold Eisenstein was a German mathematician who lived during the early twentieth century. In addition to the law of quadratic, cubic, and quartic reciprocity, he made numerous other contributions to number theory that helped him become well-known. In 1848, he was kidnapped and imprisoned by the Prussian army due to his revolutionary activities in the German capital. Even though he was freed after a day, the severe therapy he received had a negative influence on his overall health. He died of tuberculosis in 1852, when he was only 29 years old and was the youngest person ever to do so.
Yutaka Taniyama was a Japanese mathematician who, unfortunately, committed suicide on November 17, 1958, at thirty-three.