If you didn't cancel the 580 score, then it will be on your score report that schools see, at least as long as it's not from many years ago. Schools see an entire history of your GMAT attempts from the last five years. Schools can have differing policies when test takers have taken the GMAT more than once, but it's usually the case that schools only look at the highest score. So it's likely your target school will consider you a 580-scorer when looking at your application.