If a widow, widower or divorcee commits zina then which punishment do they get?

The punishment for Zina is whipping for the unmarried felon and stoning for the married felon. In other words, the penalty is whipping for fornication and stoning for adultery. Suppose there is a person who was married in the past but is no longer married. If the said person now commits zina then is (s)he given the punishment of whipping or stoning?