> Very highly magnified images require more than the standard 64–128 or so bits > of precision that most hardware floating-point units provide, requiring > renderers to use slow "bignum" or "arbitrary-precision" math libraries to > calculate.
[https://en.wikipedia.org/wiki/Mandelbrot_set#Perturbation_theory_and_series_approximation](https://en.wikipedia.org/wiki/Mandelbrot_set#Perturbation_theory_and_series_approximation)
