Explanation Factor the natural numbers with help of the factor tree. If the number is not factorable by any prime, then the number is prime. Calculation: Given, The number 621. Here, 23 < 621 < 29 . Thus, the greatest prime factor of the given number will not be greater than 23. Now, let us factor the given number by using a factor trees. Clearly 2 is not a factor of 621. Since, the sum of the digits of all the digits in 621 is 9, 621 are divisible by 3 and thus 3 is a factor of 621.

6th Edition

ISBN: 8220103632027

Author: Pirnot

Publisher: Pearson Education (US)

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Chapter 6.1, Problem 41E

To determine

To factor:

The natural number 621 and to state whether it is prime 621.

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Chapter 6.1, Problem 40E

Chapter 6.1, Problem 42E

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To factor: The natural number 621 and to state whether it is prime 621.

Solution Summary: The author explains how to factor the natural number 621 and state whether it is prime. The greatest prime factor of the given number will not be greater than 23.