That particular odyssey is now over. My mind is now at rest.
I never use a computer.
It's fine to work on any problem, so long as it generates interesting mathematics along the way - even if you don't solve it at the end of the day.
I had this rare privilege of being able to pursue in my adult life, what had been my childhood dream.
The greatest problem for mathematicians now is probably the Riemann Hypothesis.
I was so obsessed by this problem that I was thinking about it all the time - when I woke up in the morning, when I went to sleep at night - and that went on for eight years.