Prime & Composite

Front

What is a prime number?

Back

A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.

Front

What is a composite number?

Back

A composite number is a natural number greater than 1 that has more than two positive divisors.

Front

List the first five prime numbers.

Back

2, 3, 5, 7, 11

Front

List the first five composite numbers.

Back

4, 6, 8, 9, 10

Front

What are the only factors of a prime number?

Back

1 and itself.

Front

Is the number 1 prime or composite?

Back

Neither; 1 is not considered a prime or composite number.

Front

What is the smallest prime number?

Back

2, which is also the only even prime number.

Front

What is the largest prime number known?

Back

As of now, the largest known prime number is 2^82,589,933 − 1.

Front

How can you determine if a number is prime?

Back

To determine if a number is prime, check if it has any divisors other than 1 and itself by testing divisibility with prime numbers up to its square root.

Front

What is the prime factorization of 12?

Back

2^2 × 3.