Google trying to fix mysterious 'porn search bug'

A Google search for "-4^(1/4)" at the time of writing revealed the result on a calculator, below which were several pages of porn links with titles such as "four guys and a hooker" and others too lewd to repeat here.

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According to the Age, other search strings that return mostly adult links included, "1 2"-1, "1 2" -2, "h 3" -h, "1 4" -4 and "apple 1" -apple.

The first person to notice the bug appears to be a poster on Quora who wondered what was causing this ‘equation porn' when users search for contradictory queries.

Google search engineer Jeremy Hoffman said that firm was working on a "bug fix".