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Is 91 Prime?




When it comes to the number 91, the question of whether it is a prime number often arises. To determine if a number is prime, we need to understand what prime numbers are and how they differ from composite numbers.

Prime numbers are whole numbers greater than 1 that have only two factors: 1 and the number itself. In other words, a prime number can only be divided evenly by 1 and itself. Examples of prime numbers include 2, 3, 5, 7, 11, and so on. On the other hand, composite numbers are numbers that have more than two factors, meaning they can be divided by multiple numbers other than 1 and the number itself.

Now, let's assess whether 91 is a prime number. To do this, we can check if 91 has any factors other than 1 and 91. If it does, then it is a composite number.

Factors of 91:

  • 1 x 91
  • 7 x 13

From the factorization above, we can see that 91 can be evenly divided by 1, 7, 13, and 91. Since 91 has factors other than 1 and itself, it is not a prime number. Instead, 91 is a composite number because it can be expressed as the product of 7 and 13.

Understanding the distinction between prime and composite numbers is crucial in mathematics, as it forms the basis for various mathematical concepts and calculations. While 91 may not be prime, it still holds its place within the realm of numbers with its own unique characteristics and properties.

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