def aishishai(n):
    if n < 2:
        return []
    prime = [True] * (n + 1)
    prime[0] = prime[1] = False
    ——————————————————————————————————
    if prime[p]:
        for i in range(p * p, n + 1, p):
            prime[i] = False
    return [p for p in range(n + 1) if prime[p]]