Let $N \in \text{Geometric}(\theta)$ be a D4001: Geometric random positive integer.
Let $n \in \{ 1, 2, 3, \, \ldots \}$ be a D5094: Positive integer.

Then \begin{equation} \mathbb{P}(N = n) = \theta (1 - \theta)^{n - 1} \end{equation}