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47 number - In mathematics |  | 47 number - In mathematics: Encyclopedia II - 47 number - In mathematics |  | Forty-seven is the 15th prime number, a safe prime, a supersingular prime, and the 6th Lucas prime. 47 is a highly cototient number. It is an Eisenstein prime with no imaginary part and real part of the form 3n − 1.
It is also a Keith number, because it recurs in a Fibonacci-like sequence started from its base 10 digits: 4, 7, 11, 18, 29, 47...
47 is a strictly non-palindromic number.
Its representation in binary being 101111, 47 is a prime Thabit number, and as such is related to the pair of amicable numbers ...
See also:47 number, 47 number - In mathematics, 47 number - In science, 47 number - References to 47, 47 number - In other fields |  | | 47 number, 47 number - In mathematics, 47 number - In other fields, 47 number - In science, 47 number - References to 47 |  | |
|  |  | 47 number: Encyclopedia II - 47 number - In mathematics
47 number - In mathematics
Forty-seven is the 15th prime number, a safe prime, a supersingular prime, and the 6th Lucas prime. 47 is a highly cototient number. It is an Eisenstein prime with no imaginary part and real part of the form 3n − 1.
It is also a Keith number, because it recurs in a Fibonacci-like sequence started from its base 10 digits: 4, 7, 11, 18, 29, 47...
47 is a strictly non-palindromic number.
Its representation in binary being 101111, 47 is a prime Thabit number, and as such is related to the pair of amicable numbers {17296, 18416}.
47 is a Carol number.
Other related archives>>, <<, 0, 10, 15, 1923, 1947, 1964, 1979, 1998, 20, 258, 30, 40, 41, 42, 43, 44, 45, 46, 47, 47 BC, 48, 49, 50, 6, 60, 70, 80, 90, AK-47, Adirondacks, Ako vendetta, Alias, April 2, California, Carol number, Cetus, Earl Weaver Baseball, Eisenstein prime, February 5, Fibonacci, French, Harry Kim, High Peaks, Hitman, Integers, Japanese, Jesus, Joe Menosky, July 31, Keith number, Law & Order, List of numbers, Lost, Lot-et-Garonne, Lucas prime, M47, May 10, Messier object, Milo Rambaldi, NYPD Blue, New General Catalogue, New Testament, Norway, Pancho Villa, Pomona College, Puppis, Republic P-47 Thunderbolt, Rick Berman, Saros, Scrubs, Sev Trek, Star Trek: Deep Space Nine, Star Trek: Enterprise, Star Trek: The Next Generation, Star Trek: Voyager, Star Wars: Knights of the Old Republic, Takako Minekawa, Thabit number, The Simpsons, The West Wing, Threshold, USA, amicable numbers, assault rifle, astronomy, atomic number, barred spiral galaxy, code for international direct dial, constellation, département, electronic, highly cototient number, inside joke, lore, lunar eclipse, magnitude, mathematical proof, miracles, musician, natural number, open cluster, prime number, safe prime, samurai, silver, solar eclipse, song, strictly non-palindromic number, supersingular prime, video games
 Adapted from the Wikipedia article "In mathematics", under the G.N U Free Docmentation License. Please also see http://en.wikipedia.org/wiki |
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