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shiumachi/prime_list_regexp.py

Created April 12, 2010 22:25
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prime_list_regexp.py
#!/usr/bin/python
# print prime number between 2 - N with re module, where N is argv[1]
# very very slow
import sys,re
r = re.compile('^(..+)\\1+$')
N = int(sys.argv[1])
for i in xrange(2,N):
if not r.match('x' * i):
print i
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