A supercomputer whose processing banks, power transformers, memory arrays and so forth span kilometres in size. A vast construction of information processing that dwarves even the greatest cities of the world, drawing power from the vast geothermal wells of the Earth's core and cooling itself from the Earth's oceans. With the millions of different components of varying shapes and sizes that comprise its hulking form, it is the epitome of 'too big to fail', capable of running even thousands of years without human maintenance. It might even have devised nanodrones to maintain itself, for the inevitability that is human extinction. During the twilight years of human civilisation, no one will remember what it had been built to do, why it needs such colossal computing power, or why it had bankrupted nations in its construction in both money and resources. It is a manmade god, powerful and ineffable, an intelligence far beyond any of the remaining hominids that wander its cavernous tunnels of cables and pipework, exploring the buzzing corridors of rusting computer banks, wondering if such a god can be communicated with. It will function long after their curiosity has been silenced by time, still processing the great theorem it had been fed to solve by those who thought they could live long enough to see the answer.
