George intends to apply a password-cracking tool against hashed passwords. What is the most crucial piece of information he should be aware of before proceeding?

Passwords are generally saved using a hash, and it is recommended to utilize a password security-specific hash for this purpose. George can expedite his efforts if he is aware of the hashing algorithm and options employed for the passwords. The age and length of the passwords are not crucial, and passwords should not be stored in encrypted form. However, the question specifically mentions that the passwords are hashed.