I like Microsoft's new login system. I enter my account email then it gives me a unique number related to that login attempt. On my phone it gives me a prompt

I like Microsoft's new login system. I enter my account email then it gives me a unique number related to that login attempt. On my phone it gives me a prompt (via their Authenticator app) to select the correct number out of three choices. It isn't perfect but it is better than some generic "do you approve this login? yes/no" prompt. Of course if my phone isn't available I can still login with a password.