Prime factors of 1991

The prime factors are: 11, 181
Prime Factor Decomposition or Prime Factorization is the process of finding which prime numbers can be multiplied together to make the original number. 1991 divided by 11, 181 gives no remainder. This means Prime number are numbers that can divide without remainder.

How to Calculate Prime Factorization of 1991?

The main method of prime factorization is start dividing the number by the any divisible prime numbers until the only numbers left are prime numbers \( (2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, ...) \).

\(1991\div \color{red}{11} = 181\)
\(181\div \color{red}{181} = 1\)

Factorize\( (1991) = \) \(11\times 181\)