There are only so many seconds in a year, and if you know the PRNG and assume reasonable constraints for the password generator (length, symbols, numbers) you c

There are only so many seconds in a year, and if you know the PRNG and assume reasonable constraints for the password generator (length, symbols, numbers) you can iterate this space orders of magnitude faster than brute-force. The proper way to do this for cryptographic purposes is use the RNG facility provided by the kernel, which mixes in local entropy. Or go directly to the CPU like Intel’s RDRAND instruction. But the kernel should be using this if it’s enabled.