prime number

A whole number greater than 1 that can not be made by multiplying other whole numbers. Example: 5 is a prime number. We cannot multiply 2, 3 or 4 together to make 5. (Only 1?5 works but we said to use other whole numbers.). In math, prime numbers are whole numbers greater than 1, that have only two factors – 1 and the number itself. Prime numbers are divisible only by the number 1 or itself. For example, 2, 3, 5, 7 and 11 are the first few prime numbers. Learn with the Complete K-5 Math Learning Program.

A prime number is a positive integer grater than one, that can only be exactly divided by the positie integers numebrs and itself without leaving a remainder. For example 7 is prime, because it can only be divided by 1 and 7. If you divide it by say 2, you get 3 with a remainder of 1. Because you get the remainder, the division is not exact. So a prime is a defimition number, and the only whole numbers that exactly divide into it, without a remainder, it are one and the number itself.

Euclid proved thousands of years ago that there are an infinite number of prime numbers. They tend to be spaced fairly close together when they are small numbers, and get further apart as they get bigger. As of now, the largest known prime has over 17 million digits. One major use of prime numbers is in the field of encryption. Sometimes web pages contain personal information and information that you want to keep strictly private such as credit card numbers.

You would not want anyone 'listening in' on the Internet to see this information. To do this, the pages can be encrypted during transmission turned into gibberish using a secret code. The coding method uses a technique involving a large number that is the product of two prime numbers. It turns out to be extremely matj to find these factors unless you know them in advance. Composite numbers are the opposite of prime numbers.

They are integers that do have integer factors. Any integer that is not prime is a composite number. It is 'composed' of other integer factors. Home Contact About Subject Index.

Definition: What reading strategy is maria using prime number is a positive integer greater than one, that has no positive integer factors except one and itself.

The first 48 prime numbers

Oct 19, · English Language Learners Definition of prime number mathematics: a number (such as 2, 3, or 5) that can only be exactly divided by itself and by 1 See the full definition for prime number in the English Language Learners Dictionary. Jan 16, · A prime number is a positive integer having exactly two factors. If p is a prime, then it’s only factors are necessarily 1 and p itself. Any number which does not follow this is termed as composite numbers, which means that they can be factored into other positive integers. First Ten Prime Numbers. 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.

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'prime number. Send us feedback. See more words from the same year. Accessed 24 Apr. More Definitions for prime number. See the full definition for prime number in the English Language Learners Dictionary.

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Definition of prime number. Examples of prime number in a Sentence Recent Examples on the Web But to be widely digitally delicate, a prime number must also become composite if any of its digits is decreased.

First Known Use of prime number , in the meaning defined above. Keep scrolling for more. Learn More about prime number. Time Traveler for prime number The first known use of prime number was in See more words from the same year.

Dictionary Entries near prime number prime meridian prime minister prime mover prime number primer prime rate primero See More Nearby Entries. Style: MLA. English Language Learners Definition of prime number. Kids Definition of prime number. More from Merriam-Webster on prime number Britannica.

Comments on prime number What made you want to look up prime number? Show Comments Hide Comments. Get Word of the Day daily email! Test Your Vocabulary. Test your visual vocabulary with our question challenge! Anagram puzzles meet word search. Love words? Need even more definitions? We're intent on clearing it up 'Nip it in the butt' or 'Nip it in the bud'? We're gonna stop you right there Literally How to use a word that literally drives some pe Is Singular 'They' a Better Choice?

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