求第10001个质数
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from time import clock
primes=[2,3,5,7,11,13,17,19]
i=19+2
while len(primes)<10002:
flag=True
for prime in primes:
if i%prime==0:
flag=False
break
if flag:
primes.append(i)
i=i+2
#print(primes)
print(primes[-2])
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答案是:104743