"enough" hides a surprising amount of work. Mobilise the entire planet's computers for a decade, assuming a generous Moore's law increase as well, and you might

"enough" hides a surprising amount of work. Mobilise the entire planet's computers for a decade, assuming a generous Moore's law increase as well, and you might count through seventeen 8-bit grayscale pixels in that decade. Annihilate the Sun and you won't get enough energy to drive a simple counter through thirty 8-bit grayscale pixels. https://security.stackexchange.com/a/6149/ https://security.stackexchange.com/a/6149/