Buggy python submission (verdict: Time Limit Exceeded):
# -*- coding: utf-8 -*-
import bisect
import heapq
import math
import random
import sys
from collections import Counter, defaultdict, deque
from decimal import ROUND_CEILING, ROUND_HALF_UP, Decimal
from functools import lru_cache, reduce
from itertools import combinations, combinations_with_replacement, product, permutations
from operator import add, mul, sub

from fractions import gcd

sys.setrecursionlimit(100000)


def read_int():
    return int(input())


def read_int_n():
    return list(map(int, input().split()))


def read_float():
    return float(input())


def read_float_n():
    return list(map(float, input().split()))


def read_str():
    return input().strip()


def read_str_n():
    return list(map(str, input().split()))


def error_print(*args):
    print(*args, file=sys.stderr)


def mt(f):
    import time

    def wrap(*args, **kwargs):
        s = time.time()
        ret = f(*args, **kwargs)
        e = time.time()

        error_print(e - s, 'sec')
        return ret

    return wrap



@mt
def slv(N, A):
  
    ans = 0
    for i in range(N):
        cand = A[0] if i != 0 else A[1]
        for j, a in enumerate(A):
            if i == j:
                continue
            cand = gcd(cand, a)
            if cand <= ans:
                break
        ans = max(ans, cand)
        
    return ans


def main():
    N = read_int()
    A = read_int_n()
    print(slv(N, A))

    # N  = 10**5
    # A = [10**9] * N
    # print(slv(N, A))


if __name__ == '__main__':
    main()


Fixed submission:
# -*- coding: utf-8 -*-
import bisect
import heapq
import math
import random
import sys
from collections import Counter, defaultdict, deque
from decimal import ROUND_CEILING, ROUND_HALF_UP, Decimal
from functools import lru_cache, reduce
from itertools import combinations, combinations_with_replacement, product, permutations
from operator import add, mul, sub

from fractions import gcd

sys.setrecursionlimit(100000)


def read_int():
    return int(input())


def read_int_n():
    return list(map(int, input().split()))


def read_float():
    return float(input())


def read_float_n():
    return list(map(float, input().split()))


def read_str():
    return input().strip()


def read_str_n():
    return list(map(str, input().split()))


def error_print(*args):
    print(*args, file=sys.stderr)


def mt(f):
    import time

    def wrap(*args, **kwargs):
        s = time.time()
        ret = f(*args, **kwargs)
        e = time.time()

        error_print(e - s, 'sec')
        return ret

    return wrap



@mt
def slv(N, A):
    L = [A[0]]
  
    for a in A[1:]:
        L.append(gcd(L[-1], a))
        
    R = [-1] * N
    R[-1] = A[-1]
    for i in range(N-2, -1, -1):
        R[i] = gcd(R[i+1], A[i])
    
    ans = 0
    for i in range(N):
        if i == 0:
            ans = max(ans, R[i+1])
        elif i == N-1:
            ans = max(ans, L[i-1])
        else:
            ans = max(ans, gcd(L[i-1], R[i+1]))
    return ans
    


def main():
    N = read_int()
    A = read_int_n()
    print(slv(N, A))


if __name__ == '__main__':
    main()

Buggy python submission (verdict: Runtime Error):
# -*- coding: utf-8 -*-
import bisect
import heapq
import math
import random
import sys
from collections import Counter, defaultdict, deque
from decimal import ROUND_CEILING, ROUND_HALF_UP, Decimal
from functools import lru_cache, reduce
from itertools import combinations, combinations_with_replacement, product, permutations
from operator import add, mul, sub

sys.setrecursionlimit(100000)


def read_int():
    return int(input())


def read_int_n():
    return list(map(int, input().split()))


def read_float():
    return float(input())


def read_float_n():
    return list(map(float, input().split()))


def read_str():
    return input().strip()


def read_str_n():
    return list(map(str, input().split()))


def error_print(*args):
    print(*args, file=sys.stderr)


def mt(f):
    import time

    def wrap(*args, **kwargs):
        s = time.time()
        ret = f(*args, **kwargs)
        e = time.time()

        error_print(e - s, 'sec')
        return ret

    return wrap



@mt
def slv(N, A):
  
    ans = 0
    for i in range(N):
        cand = A[0] if i != 0 else A[1]
        for j, a in enumerate(A):
            if i == j:
                continue
            cand = math.gcd(cand, a)
            if cand <= ans:
                break
        ans = max(ans, cand)
        
    return ans


def main():
    N = read_int()
    A = read_int_n()
    print(slv(N, A))

    # N  = 10**5
    # A = [10**9] * N
    # print(slv(N, A))


if __name__ == '__main__':
    main()


Fixed submission:
# -*- coding: utf-8 -*-
import bisect
import heapq
import math
import random
import sys
from collections import Counter, defaultdict, deque
from decimal import ROUND_CEILING, ROUND_HALF_UP, Decimal
from functools import lru_cache, reduce
from itertools import combinations, combinations_with_replacement, product, permutations
from operator import add, mul, sub

from fractions import gcd

sys.setrecursionlimit(100000)


def read_int():
    return int(input())


def read_int_n():
    return list(map(int, input().split()))


def read_float():
    return float(input())


def read_float_n():
    return list(map(float, input().split()))


def read_str():
    return input().strip()


def read_str_n():
    return list(map(str, input().split()))


def error_print(*args):
    print(*args, file=sys.stderr)


def mt(f):
    import time

    def wrap(*args, **kwargs):
        s = time.time()
        ret = f(*args, **kwargs)
        e = time.time()

        error_print(e - s, 'sec')
        return ret

    return wrap



@mt
def slv(N, A):
    L = [A[0]]
  
    for a in A[1:]:
        L.append(gcd(L[-1], a))
        
    R = [-1] * N
    R[-1] = A[-1]
    for i in range(N-2, -1, -1):
        R[i] = gcd(R[i+1], A[i])
    
    ans = 0
    for i in range(N):
        if i == 0:
            ans = max(ans, R[i+1])
        elif i == N-1:
            ans = max(ans, L[i-1])
        else:
            ans = max(ans, gcd(L[i-1], R[i+1]))
    return ans
    


def main():
    N = read_int()
    A = read_int_n()
    print(slv(N, A))


if __name__ == '__main__':
    main()