Longest-standing maths problem ever
Who
Andrew Wiles
What
358 years first
Where
United States (New Jersey)
When
1995
Andrew Wiles (UK), currently at Princeton University in New Jersey, USA, proved Fermat's Last Theorem in 1995. He showed that xn+yn=zn has no solutions in integers for n being equal to or greater than 3. The theorum was posed by Fermat in 1630, and stood for 365 years.