diff --git a/seminar04_templates/03_factorization/main.cpp b/seminar04_templates/03_factorization/main.cpp
index fde4487..990b5eb 100644
--- a/seminar04_templates/03_factorization/main.cpp
+++ b/seminar04_templates/03_factorization/main.cpp
@@ -5,8 +5,6 @@
 
 using std::cout, std::endl, std::pair, std::vector;
 
-int next_prime(int n);
-
 vector<pair<int, int>> factorization(int n) {
     if (n == 1) {
         return vector<pair<int,int>>{{1, 1}};
@@ -23,31 +21,11 @@ vector<pair<int, int>> factorization(int n) {
         }
         if (c)
             result.push_back(pair{d, c});
-        d = next_prime(d);
+        d++;
     }
     return result;
 }
 
-bool is_prime(int n) {
-    bool prime = true;
-    for(int i = 2; i <= static_cast<int>(std::sqrt(n)); i++) {
-        if (n % i == 0) {
-            prime = false;
-            break;
-        }
-    }
-    return prime;
-}
-
-int next_prime(int n) {
-    ++n;
-    while (true) {
-        if (is_prime(n))
-                return n;
-        ++n;
-    }
-}
-
 std::ostream& operator<<(std::ostream& out, pair<int,int> p) {
     out << "{" << p.first << ", " << p.second << "}";
     return out;