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On average you have 126 ancestors to check.
Canada became a nation in 1867.
Today it's 2026.
2026 – 1867 = 159 years.
One generation = 25 years.
round(159 years / 25 years) = 6 generations.
Everyone has 2 parents.
Simplifying for no inbreeding, and everyone being having children with only one partner.
2 ^ 6 = 64 oldest ancestors
2 ^ 7 - 1 = 127 eligible family members, and yourself.
127 - 1 = 126 eligible ancestors.