61 (number)

61 (sixty-one) is the natural number following 60 and preceding 62.

60 61 62
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Cardinalsixty-one
Ordinal61st
(sixty-first)
Factorizationprime
Prime18th
Divisors1, 61
Greek numeralΞΑ´
Roman numeralLXI
Binary1111012
Ternary20213
Octal758
Duodecimal5112
Hexadecimal3D16

In mathematics

61 is:

In the list of Fortunate numbers, 61 occurs thrice, since adding 61 to either the tenth, twelfth or seventeenth primorial gives a prime number[9] (namely 6,469,693,291; 7,420,738,134,871; and 1,922,760,350,154,212,639,131).

In science

Astronomy

In other fields

Sixty-one is:

  • The number of the French department Orne
  • The code for international direct dial phone calls to Australia
  • 61*, a 2001 baseball movie directed by Billy Crystal
  • Highway 61 Revisited is a Bob Dylan album
  • The Highway 61 Blues Festival occurs annually in Leland, Mississippi
  • Highway 61 (film) is a 1991 film set on U.S. Route 61
  • U.S. Route 61 is the highway that inspired so much attention on "Highway 61"
  • Part 61 is a law created by the FAA regarding medical exams. This law has often come under attack by AOPA.
  • The 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
  • Sixty 1 brand tobacco produced by Nationwide Tobacco
  • 61A is the London address of Margot Wendice (Grace Kelly) and Tony Wendice (Ray Milland) in the movie "Dial M for Murder"
  • 1 Liberty Place is Philadelphia's tallest building at 61 stories
  • The number of Citadel cadets on The Summerall Guards
  • The number of points required to win a "standard" game of Cribbage[10]
  • The maximum number of tables that can be joined in a single MariaDB or MySQL query[11]

In sports

gollark: And likely less fragile.
gollark: If I have a choice between a simple solution to a problem and a complex one I'll pick the simpler one as it will likely be easier to develop and maintain.
gollark: Complicated things are more annoying and harder to work with generally.
gollark: From political arguments. In <#471334670483849216>.
gollark: NONE are safe.

References

  • R. Crandall and C. Pomerance (2005). Prime Numbers: A Computational Perspective. Springer, NY, 2005, p. 79.
  1. "Sloane's A002407 : Cuban primes". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30.
  2. Dickson, L. E., History of the Theory of Numbers, Volume 1, Chelsea Publishing Co., 1952.
  3. "Sloane's A000043 : Mersenne exponents". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30.
  4. "Sloane's A001844 : Centered square numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30.
  5. "Sloane's A003215 : Hex (or centered hexagonal) numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30.
  6. "Sloane's A062786 : Centered 10-gonal numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30.
  7. "Sloane's A063980 : Pillai primes". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30.
  8. "Sloane's A007629 : Repfigit (REPetitive FIbonacci-like diGIT) numbers (or Keith numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30.
  9. "Sloane's A005235 : Fortunate numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30.
  10. Hoyle, Edmund Hoyle's Official Rules of Card Games pub. Gary Allen Pty Ltd, (2004) p. 470
  11. MySQL Reference Manual – Limits of Joins
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