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sherlockforrest
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"""
输入一个正整数判断它是不是素数
Version: 0.1
Author: 骆昊
Date: 2018-03-01
"""
from math import sqrt
num = int(input('请输入一个正整数: '))
end = int(sqrt(num))
is_prime = True
for x in range(2, end + 1):
if num % x == 0:
is_prime = False
break
if is_prime and num != 1:
print('%d是素数' % num)
else:
print('%d不是素数' % num)