Definition:Primorial/Prime

Definition
Let $p_n$ be the $n$th prime number.

Then the $n$th primorial $p_n \#$ is defined as:


 * $\displaystyle p_n \# := \prod_{k \mathop = 1}^n p_k$

That is, $p_n \#$ is the product of the first $n$ primes.