diff --git a/ws2019/ipi/uebungen/primfaktorzerlegung.cpp b/ws2019/ipi/uebungen/primfaktorzerlegung.cpp
index f1d95e8..79ab3de 100644
--- a/ws2019/ipi/uebungen/primfaktorzerlegung.cpp
+++ b/ws2019/ipi/uebungen/primfaktorzerlegung.cpp
@@ -6,14 +6,12 @@ int main() {
     int k=2;
     // go until sqrt(n)
     while (k <= sqrt(n)) {
-        printf("searching for dividers for %d, checking %d\n", n, k);
         // k is factor of n
         if (n % k == 0) {
             // print out the factor k
             print(k);
             // reset n to the quotient
             n = n / k;
-            printf("found %d, setting n=%d\n", k, n);
             // restart at k=2
             k = 2;
         } else {