I did quick calculation and it's far longer than your guess.
Doesn't that take into account checksum invalid seed phrases though?
Also, it's crucial to note that attempting to recover a lost passphrase or private key through hacking or guessing is not only a bad practice but also illegal in many jurisdictions
There is no single country in this world with such arbitrary legislation, unless by "hacking" you mean that you're trying to recover and steal other people's money (which in that case would be stealing, not recovering yours).