Could you please give examples of FUNDAMENTAL questions in mathematics (let us say, pure mathematics) which were resolved FUNDAMENTALLY by the use of Computers ? More precisely, are there such examples that you can compare to those : GAUSS, RAMANUJAN, RIEMANN, GROTHENDIECK, DELIGNE, WILES, PERELMAN , ... , obtained ? Let me precise that my question do NOT mean I do not believe in Computers (as a powerfull tool!).