WolframAlpha Geometric Probability Distribution Function

Question

While using my WolframAlpha mobile app for calculations, I noticed they the geometric pdf they list seems inconsistent with my understanding (screen shot attached). I believe it should be $p (1-p)^{x-1}$. Is WolframAlpha wrong, or more likely, am I wrong?

Answer 1

Community wiki answer so the question can be closed:

The question has been answered in the comments; there are two different conventions for the geometric distribution, as explained in the corresponding Wikipedia article.