Bernhard Riemann died on July 20, 1866 at the age of 39.
This answer is closed to changes. This is done in rare cases when questions are being vandalized or answers have become debates. E-mail reopen @ answers.com (no spaces) if you would like it to be reopened.
Bernhard Riemann was born on September 17, 1826 and died on July 20, 1866. Bernhard Riemann would have been 39 years old at the time of death or 185 years old today.