fn screening_row(
permutation_total: u64,
factorial_total: u64,
brute_force: u64,
keep_pct: f64,
) -> Result<ScreeningRow, PermutationError>fn screening_row(
permutation_total: u64,
factorial_total: u64,
brute_force: u64,
keep_pct: f64,
) -> Result<ScreeningRow, PermutationError>