diff --git a/PerfectNumbers.Core/MersenneNumberDivisorByDivisorTester.cs b/PerfectNumbers.Core/MersenneNumberDivisorByDivisorTester.cs
index 423b186..4ad9c46 100644
--- a/PerfectNumbers.Core/MersenneNumberDivisorByDivisorTester.cs
+++ b/PerfectNumbers.Core/MersenneNumberDivisorByDivisorTester.cs
@@ -248,6 +248,7 @@ public static class MersenneNumberDivisorByDivisorTester
 			{
 				markComposite();
 				printResult(prime, true, true, false);
+				Console.WriteLine($"Task finished {prime}");
 				return;
 			}