* No Accurate Records: Historical records from the early spread of Islam in North Africa are often fragmented and incomplete. We don't have reliable census data from that period.
* Gradual Conversion: Islam spread through a combination of factors, including trade, conquest, and peaceful missionary work. The conversion process was often gradual and didn't happen overnight.
* Variations in Nomadic Life: Berber nomads lived in diverse groups with different levels of interaction with settled communities. Some groups were more receptive to Islam than others.
* Continuing Influences: Even after converting, many Berbers maintained some of their pre-Islamic traditions and beliefs.
However, we can say:
* Significant Exposure: The Arab conquests of North Africa in the 7th and 8th centuries exposed a large number of Berber nomads to Islam.
* Widespread Adoption: Islam eventually became the dominant religion among the majority of Berber groups.
* Ongoing Cultural Influence: Berber culture and traditions continue to be a part of the Islamic world in North Africa.
Therefore, while we can't pinpoint a specific number, it's safe to say that a large portion of Berber nomads were exposed to and adopted Islam over time.