How many Africans were forced according to the estimate of scholars into the trans-Saharan slave trade between 650 and 1500?

Scholars estimate that between 650 and 1500, approximately 10 to 20 million Africans were forced into the trans-Saharan slave trade. This trade primarily involved the movement of enslaved people from sub-Saharan Africa to North Africa and the Mediterranean region. The exact number is difficult to determine due to the lack of comprehensive records, but the impact of this trade was significant in shaping the Demographics and societies of both regions.