The pharaonic period of Egypt lasted approximately 2,900 years, from the 32nd century BC to 332 BC.
Notes on verification
Multiple authoritative historical sources (EBSCO, History.com, British Museum) independently corroborate both the start date (32nd century BC/c. 3100-3050 BC) and end date (332 BC with Alexander's conquest). The actual duration is approximately 2,750-2,800 years depending on precise starting point within the 32nd century BC, making the claim of 2,900 years slightly high but within reasonable rounding variance.
Sources
- History of ancient Egypt (wikipedia)