Sieve of Eratosthenes

import sys
input = sys.stdin.readline
M, N = map(int, input().split())

n = N
a = [False, False] + [True] * (n-1)
primes = []

for i in range(2, n + 1):
    if a[i]:
        primes.append(i)
        for j in range(2 * i, n + 1, i):
            a[j] = False

for num in primes:
    if num >= M:
        print(num)