41 (number)

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(Redirected from Forty-one)

41 (forty-one) is the natural number following 40 and preceding 42.

<< 40 41 42 43 44 45 46 47 48 49 >> List of numbers -- Integers 0 10 20 30 40 50 60 70 80 90 >>
Cardinal	41 forty-one
Ordinal	41st forty-first
Factorization	prime
Roman numeral	XLI
Binary	101001
Hexadecimal	29

1 In mathematics
2 In science
- 2.1 Astronomy
3 In sports
4 In other fields

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In mathematics

Forty-one is the 13th smallest prime number. The next is forty-three, with which it comprises a twin prime. Forty-one is also a Sophie Germain prime and a Newman-Shanks-Williams prime. 41 is the smallest Sophie Germain prime to start a Cunningham chain of the first kind of three terms, {41, 83, 167}. It is an Eisenstein prime with no imaginary part and real part of the form <math>3n - 1</math>.

The number figures in the polynomial f(n) = n² + n + 41, which yields primes for 0 ≤ n < 40.

Forty-one is the sum of two squares, 4² + 5², as well as the sum of the first six prime numbers, and also the sum of three primes (11 + 13 + 17). Adding up the sums of divisors for 1 through 7 yields 41.

It is a centered square number.

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In science

The atomic number of niobium.

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Astronomy

Messier object M41, a magnitude 5.0 open cluster in the constellation Canis Major
The New General Catalogue object NGC 41, a spiral galaxy in the constellation Pegasus
The Saros number of the solar eclipse series which began on -1588 May 28 and ended on -308 July 5. The duration of Saros series 41 was 1280.1 years, and it contained 72 solar eclipses.
The Saros number of the lunar eclipse series which began on -1268 March 18 and ended on 30 May 6. The duration of Saros series 41 was 1298.1 years, and it contained 73 lunar eclipses.

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In sports

Dirk Nowitzki has a jersey number of 41.

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In other fields

Forty-one is also:

the model number of the HP-41C/CV/CX
in A Thousand and One Nights, the number of thieves accompanying Ali Baba.
a number 'encoded' in a lot of the music of Johann Sebastian Bach. Bach may have considered this number a sort of signature, since given A = 1, B = 2, C = 3, etc., then B + A + C + H = 14 and J + S + B + A + C + H = 41.
the number of the last symphony of Wolfgang Amadeus Mozart (note, however, '37' is not in the canon)
the international direct dialling (IDD) code for Switzerland.
Charlton Heston's designation as a galley slave in the film Ben-Hur.
the since-retired number of the back of the uniform worn by Hall of Famers Eddie Mathews of the Braves, and Tom Seaver of the Mets
#41 is a song by Dave Matthews Band.
The band Sum 41.
C-41 process is the film developing process for 35mm color negative film.
The year A.D. 41, 41 BC, or 1941.
The code number given to Tetsuo Shima by scientists in the manga and 1988 film Akira
The number that appears on Trini Alvarado's forehead in Peter Jackson's The Frighteners.
Jonathan Pryce's destination level for his apartment in Terry Gilliam's Brazil.
George W. Bush's nickname for his father, George H. W. Bush, the 41st President of the United States.es:Cuarenta y uno