Problem 76

Solution: According to the definition of a composite number,
a composite number, besides 1 and itself, must have at least one other factor, meaning it has at least 3 factors.
Therefore, the statement that a composite number has at least 3 factors is correct.
Hence, the answer is: $\boxed{\text{True}}$.
In natural numbers, a number that has factors other than 1 and itself is a composite number. From this, it is known that a composite number, besides 1 and itself, must have at least one other factor, meaning it has at least 3 factors, such as 9, which has three factors: 1, 9, and 3.
Understanding the definition of a composite number is key to solving this problem.