The latest minimum credit scores are simple for an FHA loan. If you have at least a 620 credit score, you can get an FHA loan.

With Conventional loans, a 720 credit score is preferable. You may get a loan with a lower credit score, but it would cost more points (i.e. an "add-on").

There are complicated matrices used on Conventional loans and those may show that a lower credit score can still get a Conventional loan, but trust that if you are going for a Conventional loan its best to have a 720 credit score.