1 files changed, 10 insertions, 0 deletions
diff --git a/sieve_utils.cc b/sieve_utils.cc
new file mode 100644
index 0000000..51bdcf1
--- /dev/null
+++ b/sieve_utils.cc
@@ -0,0 +1,10 @@
+#include "sieve.hh"
+#include <cmath>
+
+[[nodiscard]] bool isPrime(std::size_t x) {
+  for (size_t i = 2; i <= sqrt(x); ++i)
+    if (x % i == 0) {
+      return false;
+    }
+  return true;
+}