Not really sure it counts for anything, but I have been in a 727(not flying) at around 88 kts indicated, but that was false because the angle of attack was so great the pito tubes weren't seeing actual clean air. I suppose you could hold it and descend in stall, but if one wing flashes you will be on your back in the wink of an eye.
Some collegues of mine have been up performance testing a lear the past few weeks and they had one stall that lasted like 40 seconds before he got the nose down. bucking and kicking the whole way down.