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Johannes
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Maximum and most probable total time in Egypt (comprising both initial time in freedom and subsequent time in slavery) can be calculated using Moses' genealogy in Exodus. The line is: Levi, Kohath, Amram, Moses.

• Kohath was alive when Jacob and his sons went into Egypt (Gen 46:8,11).
• Kohath lived 133 years (Ex 6:18).
• Amram lived 137 years (Ex 6:20).
• Moses was 80 years old at the time of Exodus (Ex 7:7).

Let's assume that Kohath had been born just before entering Egypt, so as to maximize time in Egypt.

The maximum possible time in Egypt is when assuming that Kohath and Amram procreated at the end of their lives.

Maximum possible total time in Egypt = 133 + 137 + 80 = 350 years

The most probable total time in Egypt is when assuming that Kohath and Amram procreated at the mid-point of their lives:

Most probable total time in Egypt = 66.5 + 68.5 + 80 = 215 years

Let's now calculate from Abraham to Exodus using the most probable time:

``````Age of Abraham at Isaac's birth (Gen 21:5)....: 100
Age of Isaac at Jacob's birth (Gen 25:26).....: 060
Age of Jacob at entrance into Egypt (Gen 47:9): 130
---------------------------------------------------
From birth of Abraham to entrance into Egypt..: 290
From entrance into Egypt to Exodus............: 215
---------------------------------------------------
From birth of Abraham to Exodus...............: 505
``````

As "Abram was seventy-five years old when he departed from Haran" (Gen 12:4):

Time from call of Abraham to Exodus: 505 - 75 = 430 years.

Johannes
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