prime number
Definition of prime number
: any integer other than 0 or ± 1 that is not divisible without remainder by any other integers except ± 1 and ± the integer itself
1570
First Known Use of prime number
1570
PRIME NUMBER Defined for English Language Learners
prime number
Definition of prime number for English Language Learners

mathematics : a number (such as 2, 3, or 5) that can only be exactly divided by itself and by 1
PRIME NUMBER Defined for Kids
prime number
Definition of prime number for Students
: a number (as 2, 3, or 5) that results in a whole number from division only when it is divided by itself or by 1
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