from time import time

with open('prime_numbers.txt', 'w') as file:
    timeBeforeBench = time()
    for num in range(2, 5001):
        i = 2
        count = 0
        while i < num:
            if num % i == 0:
                count += 1
            i += 1
        if count == 0:
            print(num, file=file)
    timeAfterBench = str(round(time() - timeBeforeBench, 2))
    print(timeAfterBench + 's', file=file)
    print('done. ' + timeAfterBench + 's')