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author | Ulrich Bauer <ulrich.bauer@tum.de> | 2016-05-03 07:05:29 +0200 |
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committer | Ulrich Bauer <ulrich.bauer@tum.de> | 2016-05-03 07:05:29 +0200 |
commit | 54ab252cce0608590207a9e2a1c69421b99b9070 (patch) | |
tree | 94d42dd9ddf0812fac8330956e42de4a5c35385d | |
parent | fcfc0e23662bbdb11ac32e32d940d9dcc3fee04e (diff) |
primality check
-rw-r--r-- | ripser.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
@@ -804,8 +804,8 @@ void compute_pairs( #endif } -bool is_prime(const long n) { - for (int i = 2; i <= n/2; ++i) if (n%i == 0) return false; +bool is_prime(const unsigned long n) { + for (unsigned long i = 2; i*i <= n; ++i) if (n%i == 0) return false; return true; } |