For problem statement at 2000-2999/2100-2199/2160-2169/2167/problemD.txt this is a correct solution, but verifier at 2000-2999/2100-2199/2160-2169/2167/verifierD.go ends with All 20 tests passed. can you fix the verifier? package main

import (
	"bufio"
	"os"
	"strconv"
)

func gcd(a, b int64) int64 {
	for b != 0 {
		a, b = b, a%b
	}
	return a
}

func main() {
	scanner := bufio.NewScanner(os.Stdin)
	scanner.Split(bufio.ScanWords)
	
	out := bufio.NewWriter(os.Stdout)
	defer out.Flush()
	
	scanInt := func() int64 {
		scanner.Scan()
		val, _ := strconv.ParseInt(scanner.Text(), 10, 64)
		return val
	}
	
	if !scanner.Scan() {
		return
	}
	t, _ := strconv.Atoi(scanner.Text())

	primes := []int64{2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53}

	for tc := 0; tc < t; tc++ {
		n := int(scanInt())
		var g int64
		for i := 0; i < n; i++ {
			a := scanInt()
			if i == 0 {
				g = a
			} else {
				g = gcd(g, a)
			}
		}

		for _, p := range primes {
			if g%p != 0 {
				out.WriteString(strconv.FormatInt(p, 10) + "\n")
				break
			}
		}
	}
}