prime number

noun Mathematics.
a positive integer that is not divisible without remainder by any integer except itself and 1, with 1 often excluded: The integers 2, 3, 5, and 7 are prime numbers.
Also called prime.


Origin:
1585–95

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Collins
World English Dictionary
prime number
 
n
Compare composite number Sometimes shortened to: prime an integer that cannot be factorized into other integers but is only divisible by itself or 1, such as 2, 3, 5, 7, and 11

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
prime number  
A positive integer greater than 1 that can only be divided by itself and 1 without leaving a remainder. Examples of prime numbers are 7, 23, and 67. Compare composite number.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

prime number definition


A number that cannot be divided evenly by any other number except itself and the number one; 1, 3, 5, 7, and 11 are prime numbers.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
It is no coincidence that the span of each brood's cycle is a prime number of years.
Especially because his age was no longer a prime number.
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