From Wikipedia, the free encyclopedia
Natural number
41 (forty-one ) is the
natural number following
40 and preceding
42 .
Look up
forty-one in Wiktionary, the free dictionary.
In mathematics
the 13th smallest
prime number . The next is
43 , making both
twin primes .
the sum of the first six prime numbers (2 + 3 + 5 + 7 + 11 + 13).
the 12th
supersingular prime
[1]
a
Newman–Shanks–Williams prime .
[2]
the smallest
Sophie Germain prime to start a
Cunningham chain of the first kind of three terms, {41, 83, 167}.
an
Eisenstein prime , with no imaginary part and real part of the form 3n − 1.
a
Proth prime as it is 5 × 23 + 1.
[3]
the largest
lucky number of Euler : the polynomial f(k ) = k 2 − k + 41 yields primes for all the integers k with 1 ≤ k < 41 .
the sum of two
squares (42 + 52 ), which makes it a
centered square number .
[4]
the sum of the first three
Mersenne primes , 3, 7, 31.
[5]
the sum of the sum of the divisors of the first 7
positive integers .
the smallest integer whose reciprocal has a 5-digit
repetend . That is a consequence of the fact that 41 is a factor of 99999.
the smallest integer whose
square root has a
continued fraction with
period 3.
[6]
a prime index prime, as 13 is prime.
In science
In astronomy
In music
In film
In other fields
See also
References
^
"Sloane's A002267 : The 15 supersingular primes" . The On-Line Encyclopedia of Integer Sequences . OEIS Foundation. Retrieved 2016-05-30 .
^
"Sloane's A088165 : NSW primes" . The On-Line Encyclopedia of Integer Sequences . OEIS Foundation. Retrieved 2016-05-30 .
^
"Sloane's A080076 : Proth primes" . The On-Line Encyclopedia of Integer Sequences . OEIS Foundation. Retrieved 2016-05-30 .
^
Sloane, N. J. A. (ed.).
"Sequence A001844 (Centered square numbers: a(n) is 2*n*(n+1)+1. Sums of two consecutive squares. Also, consider all Pythagorean triples (X, Y, Z equal to Y+1) ordered by increasing Z; then sequence gives Z values.)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation. Retrieved 2024-02-09 .
^
Sloane, N. J. A. (ed.).
"Sequence A000668 (Mersenne primes (primes of the form 2^n - 1).)" . The
On-Line Encyclopedia of Integer Sequences . OEIS Foundation. Retrieved 2024-02-09 .
^
"Sloane's A013646: Least m such that continued fraction for sqrt(m ) has period n " . The On-Line Encyclopedia of Integer Sequences . OEIS Foundation. Retrieved 2021-03-18 .
^
#41 - Dave Matthews Band | Song Info | AllMusic , retrieved 2020-08-10
^
American Skin (41 Shots) - Mary J. Blige | Songs, Reviews, Credits | AllMusic , retrieved 2020-08-10
^
41 (2007) - Christian O'Neill, Christian de Rezendes | Synopsis, Characteristics, Moods, Themes and Related | AllMovie , retrieved 2020-08-10
^
"41 (II)" .
IMDb . Retrieved June 16, 2013 .
^
"OFCOM - Number blocks and codes" . Archived from
the original on 2010-07-15. Retrieved 2009-05-05 .
^ Kellogg, William O. (2010).
Barron's AP United States History (9th ed.). Barron's Educational Series. p.
364 .
ISBN
9780764141843 . George H. W. Bush (Republican) [Bush 41—i.e., the first President Bush, George H. W. Bush was the forty-first President of the United States, and so some have referred to him in this way since the election of his son, George W. Bush or Bush 43—the forty-third president of the United States.]
^
"Reference 1" . Archived from
the original on 2008-05-31. Retrieved 2008-06-13 .
^
"Reference 2" . Archived from
the original on 2007-11-30. Retrieved 2008-06-13 .
^ Wolfe, John (2020-07-17).
"CBS Scratches 'Survivor' Season 41 Off Of Fall Schedule, Jeff Probst Dishes" . Showbiz Cheat Sheet . Retrieved 2020-11-13 .
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