记录求999990000—10000000000之间素数的运算时间。

import time
def isPrime(n):
    for i in range(2,n):
        if n%i==0:
            return False
    else:
        return True
strPrime=" "
t=time.clock()
for j in range(99999900000,10000000000):
    if isPrime(j):
        strPrime=strPrime + str (j) +","
print("Time Used:{}".format(time.clock()-t))

　　

import time
def isPrime(n):
    for i in range(2,n/2+1):
        if n%i==0:
            return False
    else:
        return True
strPrime=" "
t=time.clock()
for j in range(99999900000,10000000000):
    if isPrime(j):
        strPrime=strPrime + str (j) +","
print("Time Used:{}".format(time.clock()-t))

　　

Time Used:4.444444444444444e-06
Time Used:4.444444444444071e-06
>>