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I created a 190-digit password... How secure is this?

I know that this sounds extremely paranoid and ridiculous, but today I formatted a USB flash drive with password-protected ext4 using a 190-digit password. It consists of upper-case letters, lower-case letters, words with random capitalization, numbers and special characters. I did this on my Fedora 27 machine. How long would it take all computers on Earth today combined to crack my password? Would a quantum computer be able to crack it? Is it even easier to crack the AES-256 encryption cipher?