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author | Ulrich Bauer <mail@ulrich-bauer.org> | 2019-05-23 09:36:47 +0200 |
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committer | Ulrich Bauer <mail@ulrich-bauer.org> | 2019-05-23 09:36:47 +0200 |
commit | 4a7ce2b3c107ea5c385e6ec60ce71c05a8a453cf (patch) | |
tree | 50986ce322aef624bda43093ebaef0e5200e7043 | |
parent | 4e23d7c4264d3a0cdbe66e8909f1dae61e41e63c (diff) |
simplified is_prime
-rw-r--r-- | ripser.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
@@ -96,8 +96,8 @@ public: bool is_prime(const coefficient_t n) { if (!(n & 1) || n < 2) return n == 2; - for (coefficient_t p = 3, q = n / p, r = n % p; p <= q; p += 2, q = n / p, r = n % p) - if (!r) return false; + for (coefficient_t p = 3; p <= n / p; p += 2) + if (!(n % p)) return false; return true; } |