This number is a prime.

+ Steam locomotive number 433 stands at the trailhead of the Virginia Creeper Trail in Abingdon, Virginia.

+ Avant-garde composer John Cage's piece titled 4'33" (referred to as "four, thirty-three") entails playing nothing at all for four minutes and thirty-three seconds. [Earls]

+ The last 433 digits of 433433 form a prime number. [Gupta]

+ The smallest prime greater than three that is the sum of the digits of first integers up to another prime. [Silva]

+ The Mid Ocean Golf Club in Bermuda has a 433-yard fifth known as the "Cape." [Mello]

+ The modernist poem "The Waste Land" by T. S. Eliot is often cited as having a line count of 433, but actually contains one more. The error is due to the author himself footnoting some of the last lines incorrectly.

+ 433^4 = 35152125121 and 035+152+125+121 = 433. [Machio]

+ The number of the billiards/pool hall in the "Police Academy 2" picture.

+ The Chandler Wobble has a period of 433 days.

+ President William H. Taft signed legislation increasing the membership of the House of Representatives to 433. [Vinton]

+ The imposing rocks of the Lorelei are 433 feet above the Rhine.

+ The first multidigit prime p such that 30*p+11 starts a prime quadruplet (13001, 13003, 13007, 13009). Note that the sums of digits of its members make the first quadruplet (5, 7, 11, 13). [Loungrides]

+ Bill McKaig, a Presbyterian minister from Glasgow, Scotland, once scored a maximum 433 points on 15-1, a quiz show in Britain. [Homewood]

+ There were 433 carjackings in Cleveland, Ohio, in 2021. [O'Malley]

+ Every number is the sum of four squares, and 433 is the largest prime p for which the first square can be taken to be any positive square < p.

+ Ācārya Bhadrabāhu used the sum of a geometric series in his Kalpasūtra in 433 B.C. [Lochtefeld]

+ 433 Eros was the first asteroid to be orbited and landed upon by a robotic space probe. [Keen]

(There is one curio for this number that has not yet been approved by an editor.)

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