Mandelbrot Set Zoom 4 2^683

An extension of SCG zoom 2^391, with an interesting color palette. This zoom is similar to the 2^1051 zoom earlier, in that SCG stopped both zooms at the 5/8 point; the first convergence Julia just after the second convergence Mandelbrot...The Julia of the second convergence wants to be seen so much...Rendered in four hours. Enjoy!