I never use a computer.

I carried this problem around in my head basically the whole time. I would wake up with it first thing in the morning, I would be thinking about it all day, and I would be thinking about it when I went to sleep. Without distraction I would have the same thing going round and round in my mind.

Just because we can't find a solution it doesn't mean that there isn't one.

Then when I reached college, I realized that many people had thought about the problem during the 18th and 19th centuries and so I studied those methods.

However impenetrable it seems, if you don't try it, then you can never do it.

I grew up in Cambridge in England, and my love of mathematics dates from those early childhood days.

The greatest problem for mathematicians now is probably the Riemann Hypothesis.