01: # -*- coding: utf-8 -*-

 02: 

 03: #import numpy as np

 04: 

 05: #def init_prime_array(maximum, prime_window_size):

 06: #    LastArray = np.ones(prime_window_size, dtype=np.uint16)

 07: #    LastArray[0::2] = False

 08: #    return LastArray

 09: 

 10: 

 11: #def fakulteta(limit, window_size=1000):

 12: #    is_prime = init_prime_array(limit, window_size)

 13: #    window_start = limit - window_size

 14: #    root_limit = int(limit ** 0.5 + 1.5)

 15: # 

 16: #    for n in range(3, root_limit, 2):

 17: #        n2 = n * 2

 18: #        rem_2n = window_start % n2

 19: #        rem_2n += n if (rem_2n <= n) else -n

 20: #        start_index = n2 - rem_2n

 21: #        is_prime[start_index : : n2] = False

 22: 

 23: # Generator:

 24: #    for m in range(1, window_size, 2):

 25: #        try:

 26: #            if is_prime[m]:

 27: #                n = window_start + m

 28: #                yield (n)

 29: #        except IndexError:

 30: #            break

 31: #    return

 32: 

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