What is the smallest numbered production code listed?
CREATE TABLE "table1_29583441_1" (
  "no_in_series" real,
  "title" text,
  "directed_by" text,
  "written_by" text,
  "original_air_date" text,
  "production_code" real
);
SELECT MIN("production_code") FROM "table1_29583441_1";