# Question on Bernoulli Trials and Binomial Distributions

What distribution can I use to describe the trial number of the first success given a sequence of Bernoulli trials?

Assume the probability of success is $$p$$ (fixed) then the probability of a success on the k-th trial is:
$$$$Pr(X=k) = (1-p)^{k-1}p, \text{ where }k=1,2,..$$$$