Hello,
I have a question to dispel doubts about the diff index in VanitySearch.
Suppose I am looking for the prefix "1RoseCross".
VanitySearch reports difficulty 173346595075428800 for the indicated prefix.

1. Is this value simply speaking - a group that creates 100% addresses where one of them will start with a given search (1RoseCross)?
2. If YES, is "173346595075428800" a decimal value which in hex is "0x0267d9cf4e7e91c0"?
3. If YES, are there any cases or exceptions in which it will be possible not to find the prefix after scanning the range 173346595075428800 despite the fact that VanitySearch has given such difficulty value?

Thank you in advance for your response!