Review question

# What is the primorial of a number? Add to your resource collection Remove from your resource collection Add notes to this resource View your notes for this resource

Ref: R8811

## Question

The primorial of a number is the product of all the prime numbers less than or equal to that number. For example, the primorial of $6$ is $2 \times 3 \times 5 = 30$.

How many different whole numbers have a primorial of $210$?