So you mean the oldest pyramid, not the last? The pyramids in Egypt were built starting around ~2660 BCE up until ~1530 BCE, with the 3 in Giza through 2600 to 2530 BCE, roughly. All dates give or take maybe 10 years. The dates you have would likely be a range for the first of the 3 pyramids in Giza.
My Google research shows the Egyptian pyramids being built 2589 - 2611 BCE.
So you mean the oldest pyramid, not the last? The pyramids in Egypt were built starting around ~2660 BCE up until ~1530 BCE, with the 3 in Giza through 2600 to 2530 BCE, roughly. All dates give or take maybe 10 years. The dates you have would likely be a range for the first of the 3 pyramids in Giza.