Usually means: Exponential prime-based integer sequence.
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We found 6 dictionaries that define the word Cullen number:

General (2 matching dictionaries)
  1. Cullen number: Wiktionary
  2. Cullen number: Wikipedia, the Free Encyclopedia

Computing (1 matching dictionary)
  1. Cullen number: Encyclopedia

Science (3 matching dictionaries)
  1. Cullen Number: Eric Weisstein's World of Mathematics
  2. Cullen number: PlanetMath Encyclopedia
  3. Cullen number: Prime

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Definitions from Wiktionary (Cullen number)

▸ noun:  (mathematics) A natural number of the form n·2ⁿ+1.

Similar:
Cullen prime, cyclic number, Carol number, composite number, odd number, Proth number, natural number, Catalan number, nude number, vampire number, more...

Opposite:
non-Cullen number, regular prime

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Similar:
Cullen prime, cyclic number, Carol number, composite number, odd number, Proth number, natural number, Catalan number, nude number, vampire number, more...

Opposite:
non-Cullen number, regular prime



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