[{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/47-number-wikipedia\/#BlogPosting","mainEntityOfPage":"https:\/\/wiki.edu.vn\/en\/wiki24\/47-number-wikipedia\/","headline":"47 (number) – Wikipedia","name":"47 (number) – Wikipedia","description":"From Wikipedia, the free encyclopedia Natural number 47 (forty-seven) is the natural number following 46 and preceding 48. It is","datePublished":"2019-06-13","dateModified":"2019-06-13","author":{"@type":"Person","@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/author\/lordneo\/#Person","name":"lordneo","url":"https:\/\/wiki.edu.vn\/en\/wiki24\/author\/lordneo\/","image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/c9645c498c9701c88b89b8537773dd7c?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/c9645c498c9701c88b89b8537773dd7c?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"Enzyklop\u00e4die","logo":{"@type":"ImageObject","@id":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","url":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/en.wikipedia.org\/wiki\/Special:CentralAutoLogin\/start?type=1x1","url":"https:\/\/en.wikipedia.org\/wiki\/Special:CentralAutoLogin\/start?type=1x1","height":"1","width":"1"},"url":"https:\/\/wiki.edu.vn\/en\/wiki24\/47-number-wikipedia\/","about":["Wiki"],"wordCount":3149,"articleBody":"From Wikipedia, the free encyclopediaNatural number47 (forty-seven)  is the natural number following 46 and preceding 48. It is a prime number.In mathematics[edit]Forty-seven is the fifteenth prime number, a safe prime,[1] the thirteenth supersingular prime,[2] the fourth isolated prime, and the sixth Lucas prime.[3] Forty-seven is a highly cototient number.[4] It is an Eisenstein prime with no imaginary part and real part of the form 3n \u2212 1.It is a Lucas number. It is also a Keith number because its digits appear as successive terms earlier in the series of Lucas numbers: 2, 1, 3, 4, 7, 11, 18, 29, 47, …[5]It is the number of trees on 9 unlabeled nodes.[6]Forty-seven is a strictly non-palindromic number.[7]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}.In science[edit]Astronomy[edit]In popular culture[edit]Pomona College[edit]The number 47 has historical implications to Pomona College, a liberal arts college in Claremont, California, and has been incorporated into various aspects of campus life.[10][11] The tradition began in the summer of 1964, when two students, Laurie Mets and Bruce Elgin, conducted a research project seeking to find out whether the number occurs more often in nature than would be expected by chance. They documented various 47 sightings, and professor Donald Bentley produced a false mathematical proof that 47 was equal to all other integers. The number became a meme among the class, which spread once the academic year began and snowballed over time.[12]Notable 47 sightings include the fact that Pomona is located off of exit 47 of Interstate 10, and the fact that the largest residential building on campus, Mudd-Blaisdell (formally Florence Carrier Blaisdell and Della Mullock Mudd Hall, a title with 47 characters), was completed in 1947 and contains a staircase with 47 balusters.[12]Many Pomona alumni have deliberately inserted 47 references into their work.[10]  Pomona hosts a community service\u2013oriented celebration every April 7 (abbreviated 4\/7 in the U.S.).[13] In the early 2010s, the college’s clock tower was set up to chime on the 47th minute of the hour.[14][15]Calendar years[edit]See also[edit]References[edit]^ “Sloane’s A005385\u00a0: Safe primes”. The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30.^ “Sloane’s A002267\u00a0: The 15 supersingular primes”. The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30.^ “Sloane’s A005479\u00a0: Prime Lucas numbers”. The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30.^ “Sloane’s A100827\u00a0: Highly cototient numbers”. The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30.^ “Sloane’s A007629\u00a0: Repfigit (REPetitive FIbonacci-like diGIT) numbers (or Keith numbers)”. The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30.^ “Sloane’s A000055: Number of trees with n unlabeled nodes”. The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Archived from the original on 2010-11-29. Retrieved 2021-12-19.^ “Sloane’s A016038\u00a0: Strictly non-palindromic numbers”. The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30.^ “Astronomy 100 \u2013 Early Astronomy”.^ The NGC \/ IC Project \u2013 Home of the Historically Corrected New General Catalogue (HCNGC) since 1993^ a b Lipka, Sara (11 February 2005). “Pomona’s Prime Number”. The Chronicle of Higher Education. Archived from the original on October 29, 2020. Retrieved 7 April 2020.^ “1964”. Pomona College Timeline. Pomona College. Archived from the original on August 7, 2020. Retrieved 7 April 2020.^ a b Dolinar, Sarah (October 1, 2000). “The Mystery of 47”. Pomona College Magazine. Vol.\u00a037, no.\u00a01. Pomona College. Archived from the original on October 26, 2020. Retrieved 7 April 2020.^ “4\/7 Celebration of Sagehen Impact”. Pomona College. Archived from the original on July 31, 2019. Retrieved 7 April 2019.^ Rowan, Brendan (November 5, 2010). “Clock Tower Bell Set to Chime On the 47th Minute”. The Student Life. Archived from the original on July 31, 2019. Retrieved 7 April 2019.^ “Tower’s bell ringing again at Pomona College”. Los Angeles Daily News. November 7, 2010. Archived from the original on July 31, 2019. Retrieved 7 April 2019.100,0001,000,00010,000,000100,000,0001,000,000,000  "},{"@context":"http:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/#breadcrumbitem","name":"Enzyklop\u00e4die"}},{"@type":"ListItem","position":2,"item":{"@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/47-number-wikipedia\/#breadcrumbitem","name":"47 (number) – Wikipedia"}}]}]