Question

Express 2431 as a product of its prime factors.

Answer 1

Given: 2431

Step-wise calculation:

1. Test divisibility by 11: 

(1 + 4) – (3 + 2)

= 5 – 5 

= 0

So, 2431 is divisible by 11.

Hence, 2431 = 11 × 221.

2. Factor 221:

Small primes; 221 ÷ 13 = 17

So, 221 = 13 × 17. 

Thus, 221 factors as 13 × 17.

2431 = 11 × 13 × 17 all factors prime.