A 1979 UNIX /etc/passwd file surfaced a couple of years ago (it's on Github[1]) ...

A 1979 UNIX /etc/passwd file surfaced a couple of years ago (it's on Github[1]) and people tried to brute force the passwords; Brian Kernighan's was the weakest. Ken Thomson's took "more than four days on an AMD Radeon RX Vega64 system running hashcat ( a password cracking tool) at about 930MH/s (Million Hashes per second)" and was the last to fall.