Understanding the Equal Sign Using Peanut Butter Cups. What a wonderful lesson! Teachers or parents can easily follow Jen’s lesson plan. I’m certain children will always remember what an equal sign means forever after.

- 47 is a prime number.
- Prime factorization: 47 is prime.
- The exponent of prime number 47 is 1. Adding 1 to that exponent we get (1 + 1) = 2. Therefore 47 has exactly 2 factors.
- Factors of 47: 1, 47
- Factor pairs: 47 = 1 x 47
- 47 has no square factors that allow its square root to be simplified. √47 ≈ 6.85565

**How do we know that ****47**** is a prime number?** If 47 were not a prime number, then it would be divisible by at least one prime number less than or equal to √47 ≈ 6.9. Since 47 cannot be divided evenly by 2, 3, or 5, we know that 47 is a prime number.

47 is never a clue in the FIND THE FACTORS puzzles.