process_pool_executor.py

import math
import signal
from concurrent.futures import ProcessPoolExecutor
from contextlib import suppress
from time import sleep

values = [40000000, 30000000, 20000000, 10000000]

PRIMES = [
    112272535095293,
    112582705942171,
    112272535095293,
    115280095190773,
    115797848077099,
    112272535095293,
    115280095190773,
    115797848077099,
    112272535095293,
    115280095190773,
    115797848077099,
    112272535095293,
    115280095190773,
    115797848077099,
    1099726899285419]


def is_prime(n):
    if n % 2 == 0:
        return False
    sqrt_n = int(math.floor(math.sqrt(n)))
    for i in range(3, sqrt_n + 1, 2):
        if n % i == 0:
            return False
    return True


def register_signal_handler():
    signal.signal(signal.SIGINT, lambda _, __: None)


def main():
    with suppress(KeyboardInterrupt):
        with ProcessPoolExecutor(
            max_workers=4,
            initializer=register_signal_handler
        ) as executor:
            for number, prime in zip(PRIMES, executor.map(is_prime, PRIMES)):
                print('%d is prime: %s' % (number, prime))
            while True:
                print("i'am alive")
                sleep(1)
    print("Good bye")


if __name__ == '__main__':
    main()