Prime factors (numbers under 50)
Grade 4 Factoring Worksheet
Example: 24 = 2x 2x2 X 3 (No - not prime)
List the prime factors for each number. Is the number prime?
1)
12 ＝
2)
44 =
3)
33 =
4) 35 =
5) 31 =
6) 36 =
7） 17 =
8)
23 =
9) 22 =
10) 26 =
11) 42 =
12) 7 =
13) 2 =
14) 28 =
15) 9 =
16) 16 =

Here are the prime factorizations for each number, followed by whether the number is prime:

1) **12** = 2 × 2 × 3  
   - **Is the number prime?** No

2) **44** = 2 × 2 × 11  
   - **Is the number prime?** No

3) **33** = 3 × 11  
   - **Is the number prime?** No

4) **35** = 5 × 7  
   - **Is the number prime?** No

5) **31** = 31  
   - **Is the number prime?** Yes

6) **36** = 2 × 2 × 3 × 3  
   - **Is the number prime?** No

7) **17** = 17  
   - **Is the number prime?** Yes

8) **23** = 23  
   - **Is the number prime?** Yes

9) **22** = 2 × 11  
   - **Is the number prime?** No

10) **26** = 2 × 13  
   - **Is the number prime?** No

11) **42** = 2 × 3 × 7  
   - **Is the number prime?** No

12) **7** = 7  
   - **Is the number prime?** Yes

13) **2** = 2  
   - **Is the number prime?** Yes

14) **28** = 2 × 2 × 7  
   - **Is the number prime?** No

15) **9** = 3 × 3  
   - **Is the number prime?** No

16) **16** = 2 × 2 × 2 × 2  
   - **Is the number prime?** No

Would you like any further details or have any questions?

Here are five additional related questions for practice:
1. What are the prime factors of 45?
2. Is 29 a prime number? If so, why?
3. What is the smallest prime factor of 48?
4. How can you tell if a number is prime?
5. Find the prime factorization of 50.

**Tip:** Prime numbers only have two distinct factors: 1 and the number itself. All other numbers are composite!

Prime factors (numbers under 50)
Grade 4 Factoring Worksheet
Example: 24 = 2x 2x2 X 3 (No - not prime)
List the prime factors for each number. Is the number prime?
1) 12 ＝
2) 44 =
3) 33 =
4) 35 =
5) 31 =
6) 36 =
7) 17 =
8) 23 =
9) 22 =
10) 26 =
11) 42 =
12) 7 =
13) 2 =
14) 28 =
15) 9 =
16) 16 =

Practice prime factorization of numbers under 50 with this Grade 4 factoring worksheet. Learn to identify prime numbers and list the prime factors for each number. Includes examples and explanations.

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