All evidence indicates that there were no Israelite slaves working on the pyramids. Rather, the detailed records indicate the opposite. The first mention of Israelites comes many, many centuries later and involves a mention of them coming to purchase slaves. It is difficult to imagine so many records could have been amended to record false data on the exact breakdowns of the crews that worked on the pyramids without any of them mentioning a slave force of any kind.
The very terms used in Exodus are not accurate for describing the land of Egypt at that time and appears to be an attempt to graft a historical account on the past with indirect information gathered about a far-off land that was very different than described. This historical slander of Egypt has confused historians enormously in trying to find any evidence that the pyramids were worked on by any slaves. It should be pointed out that with so many volunteers coming forward to secure a place in the afterlife it would not have been necessary to compel anybody to work on the pyramids - the Egyptians themselves regarded it as an honor. The Hollywood account of the whips and brutal slave labor simply have no evidence in the real world of any kind.