prime number

noun
Updated on: 3 May 2018

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

Recent Examples of prime number from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'prime number.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of prime number

1570

in the meaning defined above

See Words from the same year
NEW! Time Traveler

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

noun

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

Learn More about prime number


Seen and Heard

What made you want to look up prime number? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

a quick and clever reply

Get Word of the Day daily email!

Test Your Vocabulary

May 2018 Words of the Day Quiz

  • spring-flowers
  • Which is a synonym of raillery?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!