Max flees and tries to visit Sol, only to find that he has died. Max searches his house and finds mathematical scribblings similar to his own. On a Go board, with its pieces arranged in an Archimedean spiral, Max finds a piece of paper with the 216-digit number.
The Parker spiral is the shape of the Sun's magnetic field as it extends through the solar system. Unlike the familiar shape of the field from a bar magnet, the Sun's extended field is twisted into an arithmetic spiral by the magnetohydrodynamic influence of the solar wind.