Prime Factorization of 121

Find the prime factorization of 121. Express 121 as a product of prime numbers.

Prime factorization of
Answer: 121 = 11^2
Step-by-Step Solution
Step 1 Understand Prime Factorization

To find the prime factorization of 121, we need to express it as a product of prime numbers.


We do this by repeatedly dividing by the smallest prime that divides evenly, starting with 2.

A prime number is only divisible by 1 and itself (2, 3, 5, 7, 11, 13, ...).

Step 2 Check Divisibility by 2

121 is an odd number, so it is not divisible by 2.

We move on to check the next prime number: 3.

Step 3 Divide by 11

11 is a prime number that divides our current value. We can divide by 11 twice:


121 ÷ 11 = 11
11 ÷ 11 = 1

After dividing by 11, we have 1 remaining.

Step 4 Write the Prime Factorization

Now we combine all the prime factors we found:


Expanded form: 121 = 11 × 11


Exponential form: 121 = 11^2


We can verify: 11 × 11 = 121 ✓