1949

This number is a prime.

East Germany was established officially as the German Democratic Republic in the emirp year of 1949. [Luhn]

According to the 2000 Wisden, the prime year 1949 had the most dry days (96 out of 123) of any English summer during the 20th century. [Benney]

The first year in which the number of member states in the United Nations was prime (namely fifty-nine). [Post]

"An Elementary Proof of the Prime Number Theorem" by Atle Selberg was published in 1949. [Beedassy]

Xerox Corporation's Model A xerographic copier was released in 1949. [Merickel]

The Lee County Tobacco Festival was established in 1949. It is the longest running tobacco festival in the state of Virginia. [Marshalene]

1949 and its automorphic 19999999994444999999999 are primes. [Rivera]

The year recreational mathematician D. R. Kaprekar devised a process now known as Kaprekar's routine. [Nishiyama]

1949 is the largest emirp that can appear on a 24-hour digital clock (00:00 up to 23:59). [Gupta]

The Soviet Union tested its first atomic bomb in 1949. [Milt]

The program to build the USS United States was canceled in 1949. [Truman]

The term "supervolcano" was first used in a volcanic context in 1949. [Bridgeman]

The North Atlantic Treaty Organization (NATO) was created in 1949. [Surles]

"First light" of the Hale Telescope at the Palomar Observatory in San Diego County, California, was in 1949. [Hooper]

The American Museum of Atomic Energy (now AMSE) opened in 1949.

The Zariski cancellation problem, a fundamental problem in analytical geometry, was posed in 1949 and was disproved by Neena Gupta in 2014. In her own words, "the cancellation problem asks that if you have cylinders over two geometric structures, and that have similar forms, can one conclude that the original base structures have similar forms?” [Gudipati]