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Last updated on December 2nd, 2024

Is 143 a Prime Number?

Q: How can you express 143 as a product of prime numbers?

It's easy to express 143 as a product of prime number as we know that it is divisible by 11 and 13, hence it is expressed as 11×13.

Q: What are all the numbers divisible by 143?

143 can be divided by the numbers 1, 11, 13 and 143 itself

Q: Why do we consider number 143 as a composite number?

143 is considered as a composite number, as it has more than two factors and is divisible by both 11 and 13.

Q: Is 143 a multiple of the number 7?

143 is not a multiple of 7 as 7 is not able to divide it to an integer.

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Let's take a number which is greater than 1 and has only two factors, then this number is known as a Prime number, where the only two factors are 1 and the number itself. These two factors can divide the number, leaving no reminder. There are different methods and applications of prime numbers, which we will learn in this article

Is 143 a Prime Number?

The number 143 is not considered as a prime number because it has more than two factors.

Therefore, 143 is divisible by the numbers 1, 11, 13, 143, whereas a prime number needs to have only 2 distinct divisors.

$is 143 a prime number$

Why Is 143 Not a Prime Number?

A number is said to be a prime or not a prime only when certain conditions are met. To find those there are methods to perform and when the conditions are met only the numbers are categorized as prime and composite numbers.

The methods to check any numbers are as follows:

Count Divisor Method

Divisibility Test

Prime Number Table

Prime Factorization

Using the Counting Divisors Method

Counting divisors method refers to a type of method where we count the number of divisors of a particular number to find out whether the number is a prime number or not.

If we look at 143 we can see that it has more than 2 divisors which are 1, 11, 13, 143. Since its 143 has more than 2 divisors, it is not a prime number.

Using the Divisibility Test Method

In this test, we try to find out the prime numbers that divide the number without leaving any reminder.

Hence, we can see both 11 and 13 being prime numbers are able to easily divide 143 without leaving any remainder.

Hence, this proves that 143 is not a prime number.

Using Prime Number Chart

This is a rather simple method where we write down all the prime numbers until we cross the required number, for example lets write down all the prime numbers from 1 to 150

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149.

From looking at the above list, we can see that 143 is not a prime number.

Using the Prime Factorization Method

Prime factorization is a method where we represent a composite number based on the factors of two prime numbers. In this case, the prime factors of the number 143 would be 11×13

Common Mistakes to Avoid When Determining if 143 is a Prime Number

FAQs Of “Is 143 a Prime Number?”

1.How can you express 143 as a product of prime numbers?

2.What are all the numbers divisible by 143?

3.Why do we consider number 143 as a composite number?

4.Is 143 a multiple of the number 7?

Important Glossaries for "Is 143 a Prime Number"

Divisibility Test: It refers to a method where we can check if a number is divisible by any prime number.

Prime Factorization: Multiplying two prime numbers to get one number is called prime factorization

Composite Number : When more than two numbers can divide a number, it is called a composite number.

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Hiralee Lalitkumar Makwana

About the Author

Hiralee Lalitkumar Makwana has almost two years of teaching experience. She is a number ninja as she loves numbers. Her interest in numbers can be seen in the way she cracks math puzzles and hidden patterns.