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- Vampire_number abstract "In mathematics, a vampire number (or true vampire number) is a composite natural number v, with an even number of digits n, that can be factored into two integers x and y each with n/2 digits and not both with trailing zeroes, where v contains precisely all the digits from x and from y, in any order, counting multiplicity. x and y are called the fangs.For example: 1260 is a vampire number, with 21 and 60 as fangs, since 21 × 60 = 1260. However, 126000 (which can be expressed as 21 × 6000 or 210 × 600) is not, as 21 and 6000 do not have the correct length, and both 210 and 600 have trailing zeroes. Similarly, 1023 (which can be expressed as 31 × 33) is not, as although 1023 contains all the digits of 31 and 33, the list of digits of the factors does not coincide with the list of digits of the original number.Vampire numbers first appeared in a 1994 post by Clifford A. Pickover to the Usenet group sci.math, and the article he later wrote was published in chapter 30 of his book Keys to Infinity.The vampire numbers are:1260, 1395, 1435, 1530, 1827, 2187, 6880, 102510, 104260, 105210, 105264, 105750, 108135, 110758, 115672, 116725, 117067, 118440, 120600, 123354, 124483, 125248, 125433, 125460, 125500, ... (sequence A014575 in OEIS)There are many known sequences of infinitely many vampire numbers following a pattern, such as: 1530 = 30×51, 150300 = 300×501, 15003000 = 3000×5001, ...".
- Vampire_number wikiPageExternalLink vampire-numbers-visualized.
- Vampire_number wikiPageExternalLink f17b2281a4aa16da?lr=&ie=UTF-8.
- Vampire_number wikiPageExternalLink vampires.
- Vampire_number wikiPageExternalLink puzz_199.htm.
- Vampire_number wikiPageID "924973".
- Vampire_number wikiPageLength "4325".
- Vampire_number wikiPageOutDegree "9".
- Vampire_number wikiPageRevisionID "638620516".
- Vampire_number wikiPageWikiLink Brady_Haran.
- Vampire_number wikiPageWikiLink Category:Base-dependent_integer_sequences.
- Vampire_number wikiPageWikiLink Clifford_A._Pickover.
- Vampire_number wikiPageWikiLink Composite_number.
- Vampire_number wikiPageWikiLink Integer.
- Vampire_number wikiPageWikiLink Mathematics.
- Vampire_number wikiPageWikiLink Natural_number.
- Vampire_number wikiPageWikiLink Numerical_digit.
- Vampire_number wikiPageWikiLink Usenet.
- Vampire_number wikiPageWikiLinkText "Vampire number".
- Vampire_number wikiPageWikiLinkText "prime vampire number".
- Vampire_number wikiPageWikiLinkText "vampire number".
- Vampire_number title "Vampire Numbers".
- Vampire_number urlname "VampireNumber".
- Vampire_number wikiPageUsesTemplate Template:As_of.
- Vampire_number wikiPageUsesTemplate Template:Cite_web.
- Vampire_number wikiPageUsesTemplate Template:Classes_of_natural_numbers.
- Vampire_number wikiPageUsesTemplate Template:MathWorld.
- Vampire_number wikiPageUsesTemplate Template:No_footnotes.
- Vampire_number wikiPageUsesTemplate Template:OEIS.
- Vampire_number subject Category:Base-dependent_integer_sequences.
- Vampire_number hypernym V.
- Vampire_number type MeanOfTransportation.
- Vampire_number comment "In mathematics, a vampire number (or true vampire number) is a composite natural number v, with an even number of digits n, that can be factored into two integers x and y each with n/2 digits and not both with trailing zeroes, where v contains precisely all the digits from x and from y, in any order, counting multiplicity. x and y are called the fangs.For example: 1260 is a vampire number, with 21 and 60 as fangs, since 21 × 60 = 1260.".
- Vampire_number label "Vampire number".
- Vampire_number sameAs Q2306943.
- Vampire_number sameAs عدد_مصاص_دماء.
- Vampire_number sameAs Nombre_vampir.
- Vampire_number sameAs Vampyyriluku.
- Vampire_number sameAs Nombre_vampire.
- Vampire_number sameAs מספר_ערפד.
- Vampire_number sameAs Numero_del_vampiro.
- Vampire_number sameAs ヴァンパイア数.
- Vampire_number sameAs Número_vampiro.
- Vampire_number sameAs m.03qf_z.
- Vampire_number sameAs Числа-вампиры.
- Vampire_number sameAs Vampirsko_število.
- Vampire_number sameAs Vampyrtal.
- Vampire_number sameAs จำนวนแวมไพร์.
- Vampire_number sameAs Q2306943.
- Vampire_number sameAs 吸血鬼數.
- Vampire_number wasDerivedFrom Vampire_number?oldid=638620516.
- Vampire_number isPrimaryTopicOf Vampire_number.