The number of persons in each generation doubles: Theoretically the number of ancestors for 10 previous generations 
(dating back to approximately 1652 for many families) would be 1 024. For 30 generations dating back to approximately 
1000 AD this number would increase to 1 073 741 904. It is unlikely that a person would have so many ancestors since the 
same ancestors often appear multiple times in a pedigree chart due to intermarriage – known as “pedigree loss”