The 23 (number) reference article from the English Wikipedia on 24-Apr-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

23 (number)

23 (twenty-three) is the natural number following 22 and preceding 24.

List of numbers — Integers << 20 21 22 23 24 25 26 27 28 29 >>
Cardinal	twenty-three
Ordinal	twenty-third
Factorization	prime
Roman numeral	XXIII
Binary	10111
Hexadecimal	17

In mathematics

Twenty-three is the ninth prime number, the sequence continues 29, 31, 37, 41,... Twenty-three is also a factorial prime, a Sophie Germain prime and a Woodall prime.

In other fields

The 23rd moon of Jupiter is Carme.

Twenty-three is:

• The atomic number of vanadium.
• In early 20th century United States slang, it meant to leave a place. (From the phrase twenty-three skiddoo, which was a reference to Charles Dickens' novel A Tale of Two Cities, in which the hero Sydney Carlton was the twenty-third victim of the guillotine that day).
• The sacred number (along with 17 and 5) of Eris, Goddess of Discord from the Principia Discordia; it is the number of the Illuminati.
• Like 13, sometimes considered unlucky or otherwise significant (as in the occult writings of Aleister Crowley and William S. Burroughs).
• 23, a German movie about Karl Koch.
• A telegraphers' code meaning "line break".
• Historical years: 23 A.D., 23 B.C, or 1923

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