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| | Howdy. The author's name is Dalton but it's not the a lot of masucline name out high. The desired hobby for him and his kids is to drive and he's been doing it for many years. He works as a cashier. His wife and him chose to live on in South Carolina and his family loves the following. Go to his website to find out more: http://circuspartypanama.com<br><br>Here is my web-site ... [http://circuspartypanama.com clash of clans hack tool] |
| {{redirect|LXI|for the electronics association|LAN eXtensions for Instrumentation}}
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| {{for|the Cyrillic letter|Ы}}
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| {{Infobox number
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| | number = 61
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| | factorization = [[prime number|prime]]
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| | prime =
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| | divisor = 1, 61
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| }}
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| '''61''' ('''sixty-one''') is the [[natural number]] following [[60 (number)|60]] and preceding [[62 (number)|62]].
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| {{wiktionary|sixty-one}}
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| ==In mathematics==
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| It is the 18th [[prime number]]. The previous is [[59 (number)|59]], with which it comprises a [[twin prime]]. Sixty-one is a [[cuban prime]] of the form <math>p = (x^3 - y^3) / (x - y), x = y + 1</math>.
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| 61 is 9th [[Mersenne prime]] exponent. (2<sup>61</sup> − 1 = {{nowrap|2,305,843,009,213,693,951}})
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| Sixty-one is the sum of two squares, 5<sup>2</sup> + 6<sup>2</sup>, and it is also a [[centered square number]], a [[centered hexagonal number]] and a [[centered decagonal number]].
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| It is the sixth [[alternating permutation#Related integer sequences|Euler zigzag number]] (or Up/down number).
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| In [[base 14]], 61 is a [[unique prime]] since no other prime has a 6-digit period in base 14.
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| Since 8! + 1 is divisible by 61 but 61 is not one more than a multiple of 8, 61 is a [[Pillai prime]]. In the list of [[Fortunate number]]s, 61 occurs thrice, since adding 61 to either the tenth, twelfth or seventeenth [[primorial]] gives a prime number (namely 6,469,693,291; 7,420,738,134,871; and 1,922,760,350,154,212,639,131).
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| It is also a [[Keith number]], because it recurs in a Fibonacci-like sequence started from its base 10 digits: 6, 1, 7, 8, 15, 23, 38, 61...
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| ==In science==
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| The chemical element with the [[atomic number]] 61 ([[promethium]]), a lanthanide, is the element with the secondary lowest ordinal number that does not possess any stable isotopes. The promethium preceding element with [[atomic number]] 60 ([[neodymium]]) and the promethium following element 62 ([[samarium]]) have all [[stable isotope]]s.
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| ===Astronomy===
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| *[[Messier object]] [[Messier 61|M61]], a [[visual magnitude|magnitude]] 10.5 [[galaxy]] in the [[constellation]] [[Virgo (constellation)|Virgo]]
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| *The [[New General Catalogue]] [http://www.ngcic.org/ object] [[NGC 61]], a double [[spiral galaxy]] in the constellation [[Pisces (constellation)|Pisces]]
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| *The [[Saros number|Saros]] [http://sunearth.gsfc.nasa.gov/eclipse/SEsaros/SEsaros1-175.html number] of the [[solar eclipse]] series which began on [[-973]] May 10 and ended on 289 June 5. The duration of Saros series 61 was 1262.1 years, and it contained 71 solar eclipses.
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| *The Saros [http://sunearth.gsfc.nasa.gov/eclipse/LEsaros/LEsaros1-175.html number] of the [[lunar eclipse]] series which began on [[-870]] October 20 and ended on 609 March 26. The duration of Saros series 61 was 1478.4 years, and it contained 83 lunar eclipses.
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| *61 Ursae Majoris is located about 31.1 light-years from Sol.[http://www.solstation.com/stars/61uma.htm]
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| *61 Cygni was christened the "Flying Star" in 1792 by Giuseppe Piazzi (1746-1826) for its unusually large proper motion. [http://www.solstation.com/stars/61cygni2.htm]
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| ==In other fields==
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| '''Sixty-one''' is:
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| * The number of the French department [[Orne]]
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| * The [[code for international direct dial]] [[phone]] calls to [[Australia]]
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| *''[[61*]]'', a 2001 [[baseball movie]] directed by [[Billy Crystal]]
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| * [[Highway 61 Revisited]] is a [[Bob Dylan]] album
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| * The [[Highway 61 Blues Festival]] occurs annually in Leland, [[Mississippi]]
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| * ''[[Highway 61 (film)]]'' is a 1991 film set on U.S. Route 61
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| * [[U.S. Route 61]] is the highway that inspired so much attention on "Highway 61"
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| * Part 61 is a law created by the [[FAA]] regarding medical exams. This law has often come under attack by [[AOPA]].
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| * The [[P-61 Black Widow|P-61]] is the Northrop designed fighter first designated as the XP-61. It first flew on May 26, 1942. It is also known as the ''Black Widow'' as it was the first fighter aircraft designed to be a night fighter
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| * Sixty 1 brand tobacco produced by Nationwide Tobacco
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| * 61A is the [[London]] address of [[Margot Wendice]] ([[Grace Kelly]]) and [[Tony Wendice]] ([[Ray Milland]]) in the movie "[[Dial M for Murder]]"
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| * 1 Liberty Place is [[Philadelphia]]'s tallest building at 61 stories
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| * The number of Citadel cadets on the [[Summerall Guards]]
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| * The number of points required to win a "standard" game of [[Cribbage]]<ref>Hoyle, Edmund ''Hoyle's Official Rules of Card Games'' pub. Gary Allen Pty Ltd, (2004) p. 470</ref>
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| ==In sports==
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| * [[New York Yankees]] [[Roger Maris]] hit 61 home runs in 1961
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| * [[Nolan Ryan]] and [[Tom Seaver]] each had 61 career shutouts
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| * Hockey great [[Wayne Gretzky]] holds or shares 61 [[NHL]] records (40 for regular season, 15 for Stanley Cup playoff and 6 for All-Star Games)
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| * [[Los Angeles Lakers]]' [[Elgin Baylor]] set a record for 61 points in a NBA finals game against the Boston Celtics (April 14, 1962)
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| * [[Rotation (pool)|Rotation]], a variation of [[Pool (cue sports)|pool]], is sometimes called 61
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| * [[Richie Evans]]' [[NASCAR Whelen Modified Tour]] car number was 61 until his death in 1985
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| ==References==
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| * R. Crandall and C. Pomerance (2005). ''Prime Numbers: A Computational Perspective''. Springer, NY, 2005, p. 79.
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| <references/>
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| ==External links==
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| {{Commons cat|61 (number)}}
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| {{Integers|zero}}
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| {{DEFAULTSORT:61}}
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| [[Category:Integers]]
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