-Twenty-three is the ninth prime number, the sequence continues 29, 31, 37, 41,... Twenty-three is also the fifth factorial prime, the fifth Sophie Germain prime, the fourth safe prime, the second Woodall prime, and the second Smarandache-Wellin prime. It is an Eisenstein prime with no imaginary part and real part of the form 3n − 1. -23 also has the distinction of being one of two integers that cannot be expressed as the sum of fewer than 9 cubes of integers (the other is 239). See Waring's problem. -23 is a Wedderburn-Etherington number. -23 is a highly cototient number. -23 is the smallest odd prime that is not a twin prime. -The number of chromosomes in a human germline cell -The 23rd moon of Jupiter is Carme -The sacred number (along with 5) of Eris, goddess of discord, according to the Principia Discordia; it is the number of the Illuminat. -Robert Anton Wilson's book, Cosmic Trigger I: Final Secret of the Illuminati, lists 23 as a cosmic number with strong connections to arcane magic and synchronicity. Numerous people have claimed to see 23's everywhere (the 23 curse) prior to enormous success and fruitfulness. -In early 20th century United States slang, it meant to leave a place. (From the phrase 23 skiddoo ; the origins of the phrase are largely unknown). -Sydney Carton is the 23rd person executed at the end of A Tale of Two Cities, by Charles Dickens. -A telegraphers' code meaning "line break". -When mathematician John Forbes Nash suffered from schizophrenic delusions, he said that Life Magazine had run a cover story of him disguised as Pope John XXIII as his name was John and his favorite prime number was 23. -Nash published a total of 23 scientific articles. -The largest integer number of hours in a day. -ASCII character number 23 is ETB, end transmission block. -The number of people (16 females, 7 males) Neo was to select in order to refound Zion in The Matrix Reloaded -The smallest group of people where there is more than a 50% chance that 2 people will share the same birth day (day and month, not year). -Unusual circumstances being linked to 23 are mentioned by William S. Burroughs. He tells the story of meeting a ferry captain named Clark who claimed to have sailed the same route without an accident for 23 years. That very day, however, the ferry sank. Later that day, Burroughs writes, he was thinking about Clark's ferry accident when he heard that a Flight 23 on a New York-Miami route had crashed. According to Burroughs, the pilot's name for the flight had also been Clark. Burroughs began collecting incidences of the number 23 in a scrapbook and referred to them in his writings. -The human biorhythm is 23 days long. Though Hermann Swoboda and Wilhelm Fliess, the two doctors who first posited biorhythm, did determine that a human's 'physical cycle' was 23 days long, biorhythmics is at best a highly speculative and subjective area of study. -It takes 23 seconds for blood to circulate throughout the entire body. Blood is a suspension and does not flow at the same rate for all of its components. Furthermore, there is no single path blood takes when it circulates. For both these reasons, verification is both difficult and meaningless. In any case, the "second" is an arbitrary fraction of 1/86400 of a solar day. -The first Moon landing, Apollo 11 was in the Sea of Tranquility at 23.63 degrees East. The second landing, Apollo 12, was in the Ocean of Storms, 23.42 degrees West. Also, 11 + 12, the numbers of the missions, add up to 23. Again, this is stretched as far as the degrees, and there are at least 11 pairs of integers that add to 23, not counting negative integers or zero. -December 23, 2012 is the date the Mayan calendar ends, predicting an apocalyptic event. The Mayan calendar's "Long Count" does indeed end on either the 21st or 23rd of December of 2012, depending on calculation. -Both the ancient Egyptian and Sumerian calendars begin on 23 July. Both calendars were apparently calculated from the date of the heliacal rising of Sirius, which does occur at that latitude around that time of year. -Julius Caesar was stabbed 23 times when he was assassinated -The Knights Templar had 23 Grand Masters, the last being Jacques de Molay. -John F. Kennedy was assassinated on November 22, 1963 and his supposed assassin -- Lee Harvey Oswald -- was assassinated on November 24, 1963, the 23rd being in between. -On a normal modern latin alphabet keyboard, the 23rd letter W is right below and between 2 and 3. -Pi's first six digits (3.14159) added together equal 23. -Volkswagen's VW logo contains the roman numeral V (2+3=5) and the 23rd letter W. Volkswagen is based in Wolfsburg which starts with the 23rd letter. Interesting indeed... 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