An account on Roblox made by Shedletsky on May 25th, 2010. It was used for exploit testing in RC7.
Since then, several rumours have appeared claiming that 1x1x1x1 is
actually a hacker, however these rumors
have been debunked. Even though 1x1x1x1 was
just a test account, hackers still pretend to be 1x1x1x1 to this day.