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Vampire number

In recreational mathematics, a vampire number (or true vampire number) is a composite natural number with an even number of digits, that can be factored into two natural numbers each with half as many digits as the original number, where the two factors contain precisely all the digits of the original number, in any order, counting multiplicity. The two…

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Definition

ConcatenationPermutationClifford A. PickoverUsenet
4 related topics

Examples

OEIS
1 related topics

Other bases

Base 12
1 related topics

Overview

Recreational mathematicsCompositeNatural numberDigits
4 related topics

Topics to explore

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Overview

Definition

Examples

  • OEIS On-Line Encyclopedia of Integer Sequences

Other bases

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Map overview Semantic statistics

Vampire number

Nodes15
Edges14
Triples24
Avg. degree1.87
Density0.133333
Components1

How this topic connects Entity context

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Vampire number

Top relations

related to External links · 11
Vampire number → Al, Archived, Brady Haran, Copeland, Ed, James, Numberphile, Retrieved, Sweigart, Vampire, Vampire Numbers VisualizedGrime
related to Other bases · 8
Vampire number → A0B1, An, Another, B1A, BA3974, For, In, Vampire
related to Definition · 2
Vampire number → Let, Then
related to Examples · 2
Vampire number → Furthermore, However
related to Multiple fang pairs · 1
Vampire number → The

Important terminology Word statistics

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Important terminology

vampire number numbers digits two factors fangs original first many 21 permutation pairs displaystyle base example natural trailing zeroes 1260

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Vampire numberrelated to DefinitionLet0.60section
Vampire numberrelated to DefinitionThen0.60section
Vampire numberrelated to ExamplesHowever0.60section
Vampire numberrelated to ExamplesFurthermore0.60section
Vampire numberrelated to External linksSweigart0.60section
Vampire numberrelated to External linksAl0.60section
Vampire numberrelated to External linksVampire Numbers VisualizedGrime0.60section
Vampire numberrelated to External linksJames0.60section
Vampire numberrelated to External linksCopeland0.60section
Vampire numberrelated to External linksEd0.60section
Vampire numberrelated to External linksVampire0.60section
Vampire numberrelated to External linksNumberphile0.60section

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