The Shortest Math Proof in History - Apparently.
In 1908, the German mathematician Georg Cantor and the French mathematician Jacques Hadamard engaged in a series of letters about a fundamental concept in set theory. The shortest math proof in history was discovered in these letters, where Hadamard proved the Bertrand's postulate in just 4 words: "Il y a deux nombres premiers infinis." (There are infinitely many prime numbers.) This astonishingly brief proof was a remarkable achievement in the development of mathematics, solidifying the understanding of prime numbers and their distribution.