" However, their time comes nowhere near the two outstanding records set in 1975.
In that year Kryzsztof Zurek completed the integral crossing, solo, in a mere 70 hours, though he did have rappel ropes and food deposits in place on the ridge and a support team for the bivouacs. Wladyslaw Cywinski completed the traverse, also solo, in three and a half days, and also with rappel ropes and food/water caches on the ridge."