Top system from the November 2025 list:
name: El Capitan
location: Lawrence Livermore National Laboratory, Livermore (near San Francisco), California, United States of America
purpose: stockpile stewardship of US nuclear weapons (simulations to help test them, without doing physical tests)
number of cores: 1.134E7 = 11 340 000
clock speed (of one core): 1.8 GHz
flops (Rmax): 1809 PFlop/s
power: 29684.62 kW