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authorReiner Herrmann <reiner@reiner-h.de>2014-08-31 20:21:45 +0200
committerReiner Herrmann <reiner@reiner-h.de>2014-08-31 20:35:09 +0200
commit95341b61b030c9e1290f3b326cb7ec584f543aea (patch)
tree852386fa04d32eb859bca11c0eff7b5ef9e50f00 /035.py
parent571164d977f91925c4c76a292f74f5f93d09ae23 (diff)
moved files to higher directory after split to new repositoryHEADtrunk
Diffstat (limited to '035.py')
-rw-r--r--035.py33
1 files changed, 33 insertions, 0 deletions
diff --git a/035.py b/035.py
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+++ b/035.py
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+def circular_prime(number):
+ global number_list
+ result = True
+ number_str = str(number)
+ for i in range(1, len(number_str)):
+ rotated_str = number_str[i:] + number_str[:i]
+ rotated_nr = int(rotated_str)
+ if not number_list[rotated_nr-1]:
+ result = False
+ break
+ return result
+
+
+limit = 1000000
+
+number_list = [False]
+for i in range(2, limit+1):
+ number_list.append(True)
+
+for i in range(2, limit+1):
+ x = i*2
+ while(x <= len(number_list)):
+ number_list[x-1] = False
+ x += i
+
+count = 0
+
+for i in range(1, limit+1):
+ if number_list[i-1] and circular_prime(i):
+ count += 1
+
+print count
+