python--素数

import datetime
start = datetime.datetime.now()
count = 1
for x in range(3,100000, 2):
    if x > 10 and x % 10 == 5:
        continue
    for i in range(3,int(x ** 0.5) + 1, 2):
        if x % i == 0:
            break
    else:
        count +=1
        # print(x,count)
        pass
delta = (datetime.datetime.now() - start).total_seconds()
print(delta)
print(count)
print("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~")
start = datetime.datetime.now()
number = 100000
count = 2
for num in range(4,number):
    if num%6 !=1 and num%6 !=5:
        continue
    else:
        snum = int(num**0.5+1)
        for i in range(5,snum,2):
            if not num%i:
                break
        else:
            count +=1
            pass
# print(count)
delta = (datetime.datetime.now() - start).total_seconds()
print(delta)
print(count)
print("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~")

C:\python37\python.exe D:/python37/201901/20190109.py
0.173917
9592
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
0.168885
9592
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~