This expands the idea I posted here.
6000 (total human history)
3496 (Up to Yetziat Mitzraim + Gadlut)
2503 (Total non-Beit HaMikdash time after Yetziat Mitzraim)
The year 2503 is also the year that B'nei Yisrael started counting Shmitah and Yovel, which put an end to Exile, except for the lack of Beit HaMikdash. That is to say, before Avraham, the world was not in its proper form. From the time Avraham left Ur Kasdim (in year 1949 + 70 = 2019) until Yetziat Mitraim is another 430 years. The time in the Midbar was also preperation for Eretz Yisrael, and Eretz Yisrael only came to its proper form after the 7 years of conquering and 7 years of division.
2019 + 430 + 40 + 7 + 7 = 2503
It would seem to be that 2503 is the number of years that the world should have been in its "set-up" phase. The 2503 years of set-up should have been sufficient for the whole world, but since it wasn't, a different 2503 years were decreed upon Am Yisrael. There are 480 years from Yetziat Mitzraim to Bayit Rishon, 70 years of Galut Bavel, and 1953 years of Galut Edom. A different and overlapping (from Yetziat Mitzraim to 2503) calculation.
קוהלת ז:יד - גם זה לעמת זה עשה האלקים
Kohelet 7:14 - And also this opposing that, G-d has made
May Hashem help us to succeed in our preparations.