Jacques Hadamard
was born 152 years ago
8th December 1865

Jacques Hadamard's most important result is the prime number theorem which he proved in 1896. This states that the number of primes < n tends to infinity as fast as n/log e n.

Find out more at:
http://www-history.mcs.st-andrews.ac.uk/Mathematicians/Hadamard.html