A standard six-sided die has outcomes {1, 2, 3, 4, 5, 6}. Among these, the prime numbers are 2, 3, and 5. Note that 1 is not a prime number, and 4 and 6 are composite numbers.
When a standard die is thrown, the possible outcomes are the numbers 1, 2, 3, 4, 5, and 6. A prime number is a number greater than 1 that has no positive divisors other than 1 and itself. From the die's outcomes, the prime numbers are 2, 3, and 5. Therefore, the event of getting a prime number yields the set 2, 3, 5.