I never made a special effort for that and I only remember 12 of those digits, so maybe I'm just using an inefficient way, but I remember them as two-digit numb

I never made a special effort for that and I only remember 12 of those digits, so maybe I'm just using an inefficient way, but I remember them as two-digit numbers, not single digits. I don't think I'm alone, the basic value of pi one learns in France is "3 14 16" - "trois quatorze seize" (historically it was "trois quatorze-cent-seize" so "3 1416" but it's less used today).