Answer:
430 years
Explanation:
The Book of Exodus itself attempts to ground the event firmly in history, dating the exodus to the 2666th year after creation (Exodus 12:40-41), the construction of the tabernacle to year 2667 (Exodus 40:1-2, 17), stating that the Israelites dwelled in Egypt for 430 years (Exodus 12:40-41), and including place names. :)
