Viscous flow past a circular cylinder becomes unstable around Reynolds number Re = 40. With a numerical technique based on Newton's method and made possible by the use of a supercomputer, steady (but unstable) solutions have been calculated up to Re = 600. It is found that the wake bubble (region with recirculating flow) grows in length approximately linearly with Re. The width increases like up to Re = 300 at which paint a transition to linear increase with Re begins. At the highest Reynolds numbers we reached, the wake resembles a pair of translating, uniform vortices, both touching the center line. The cylinder; moving in front with the same speed, supplies the vorticity required to balance diffusion.