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| author | Reiner Herrmann <reiner@reiner-h.de> | 2014-08-31 20:21:45 +0200 |
|---|---|---|
| committer | Reiner Herrmann <reiner@reiner-h.de> | 2014-08-31 20:35:09 +0200 |
| commit | 95341b61b030c9e1290f3b326cb7ec584f543aea (patch) | |
| tree | 852386fa04d32eb859bca11c0eff7b5ef9e50f00 /035.py | |
| parent | 571164d977f91925c4c76a292f74f5f93d09ae23 (diff) | |
Diffstat (limited to '035.py')
| -rw-r--r-- | 035.py | 33 |
1 files changed, 33 insertions, 0 deletions
@@ -0,0 +1,33 @@ +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 + |
