Answer:
149
Step-by-step explanation:
The give numbers can be written as :
152 = 2 * 76 OR 1 * 152 OR 38 * 4
133 = 1 * 133 OR 7 * 19
156 = 2 * 78 OR 1 * 156 OR 3 * 52
149 = 1 * 149
So 149 is a prime number as it gave only 1 and the number itself as factors.
Other numbers have more than 2 factors.
Hope it helps
