Apr 23 2011

What is a prime number?

Category: Mathematics

Answer:

Prime NumbersTo accurately explain what a prime number is one must first understand the concept of factoring. Factors are numbers that you can multiply together to get another number. For instance, the factors of 18 are 1, 2, 3, 6, 9, and 18. A prime number is a whole number (greater than 1) that has only two factors, itself and the number 1. Here are a few examples of prime numbers: 2, 3, 5, 7, 11, 13, 17, 19, 23, and 29. Positive numbers that are not prime (besides 1) are considered composite numbers.


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