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Definition of prime number noun from the Oxford Advanced Learner's Dictionary

prime number

noun
 
/ˌpraɪm ˈnʌmbə(r)/
 
/ˌpraɪm ˈnʌmbər/
(also prime)
(mathematics)
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  1. a number that can be divided exactly only by itself and 1, for example 7, 17 and 41Topics Maths and measurementc2
See prime number in the Oxford Advanced American Dictionary
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