17 (number)

Seventeen redirects here. This article is relating to number 17. For the year, to see 17. ----

17 (seventeen) is the Entier naturalness according to 16 and preceding 18.

In mathematics

Seventeen is the smaller seventh Prime number. It is the third Prime number of Fermat. The following is 19, with which it forms a couple of Prime numbers twins. it forms a couple of Prime numbers cousins with 13. 17 is the sum of four prime numbers. 17 is the sixth exhibitor first of Mersenne giving 131  071. A Prime number the length.

Seventeen is a Prime number super-singular.

It results from a theorem of Gauss that it regular Polygone at seventeen sides (the heptadécagone) is constructible with the rule and the compass. By showing its construction at nineteen years, Gauss founded its fame.

There exist exactly seventeen groups of plane symmetry (Pavage S periodicals) in a space with two dimensions. It is the equivalent in two dimensions of the groups of the planks.

Like 41, number 17 is a prime number which gives prime numbers in the Polynôme n^2 + N + p, for all the positive entireties n < p - 1.

That is to say a continuation of real numbers ranging between 0 and 1 such as the first two connects the various halves of this interval, the first the three various thirds, and so on. The maximum possible length of such a continuation is 17 (Berlekamp & Graham, 1970, example 63).

In the human society: 17 years

  • With the the United States, the age to which somebody can give his blood and to go voluntary to be soldier.
  • With the the United States, the age to which somebody can see a film of category R without his parents in agreement with the system of grading of the films MPAA.

In other fields

Seventeen is:
  • the Atomic number of the Chlorine, a Halogenous .
  • off Describes with the Massachusetts Institute Technology (MIT) like “smallest random random number”, in agreement with the jargon of the Hacker.
  • a number related to the Superstition and which would carry misfortune in Italy.
  • a Swearword in Swedish. The origin makes debate, and is commonly used like “sjutton också! ” (“seventeen, too! ”). It is of course also used for number 17.
  • the maximum number of features of a Chinese root.
  • the number of syllables in a Haiku.
  • In the Ancient Rome as in Italy, this number carries misfortune. Indeed, 17 is written in Latin XVII, who has as an anagram VIXI, which means " it has vécu" , i.e. " it is mort". Thus, the equivalent in Italy of the Friday the 13th in France is the Friday the 17th.
  • In the Scandinavian Countries, the seventeenth day of the year is regarded as the heart and/or the back of the Hiver.
  • the number of trees that Dostoievsky could see window of its cell while it was in prison.
  • the number present in the titles of the films Number seventeen and Corresponding 17 of Alfred Hitchcock.
  • the number of a special significance for the Day of the yellow pig.
  • historical Years: -17, 17 or 1917
  • the number of years of pink Marriage of the weddings of .
  • the number of the Sourate Al “Isra in the Coran.
  • the n° of the French Department of the Charente-Maritime.
  • the n° of telephone of the police force or the gendarmerie in France
  • the number of the Regiment of Infantry of Béziers (17 {{E}} regiment of infantry of line) whose soldiers refused in 1907 to obey the orders, which inspired with Montéhus the Gloire song with the 17th
  • the percentage (at May 2nd, 2007) on behalf of the Nucléaire in the energy produced in France

External bonds

  • Almanac and dictionary of the numbers (site of Gerard Villemin)
  • Wiktionnaire

Ru-sib: 17 (число)

Zh-yue: 17

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