Write only prime residue results

EvenPerfectBitScanner.Tests/ProgramTests.cs

@@ -404,12 +404,18 @@ public class ProgramTests
         var outputField = typeof(Program).GetField("_outputBuilder", BindingFlags.NonPublic | BindingFlags.Static)!;
         var writeIndexField = typeof(Program).GetField("_writeIndex", BindingFlags.NonPublic | BindingFlags.Static)!;
         var compositeField = typeof(Program).GetField("_lastCompositeP", BindingFlags.NonPublic | BindingFlags.Static)!;
+        var primeCountField = typeof(Program).GetField("_primeCount", BindingFlags.NonPublic | BindingFlags.Static)!;
+        var primeFoundField = typeof(Program).GetField("_primeFoundAfterInit", BindingFlags.NonPublic | BindingFlags.Static)!;
+        var consoleCounterField = typeof(Program).GetField("_consoleCounter", BindingFlags.NonPublic | BindingFlags.Static)!;
         var printResult = typeof(Program).GetMethod("PrintResult", BindingFlags.NonPublic | BindingFlags.Static)!;
 
         var previousResidueMode = (bool)residueModeField.GetValue(null)!;
         var previousOutput = (StringBuilder?)outputField.GetValue(null);
         var previousWriteIndex = (int)writeIndexField.GetValue(null)!;
         var previousComposite = (bool)compositeField.GetValue(null)!;
+        var previousPrimeCount = (int)primeCountField.GetValue(null)!;
+        var previousPrimeFound = (bool)primeFoundField.GetValue(null)!;
+        var previousConsoleCounter = (int)consoleCounterField.GetValue(null)!;
 
         var builder = StringBuilderPool.Rent();
 
@@ -420,11 +426,19 @@ public class ProgramTests
             compositeField.SetValue(null, true);
             outputField.SetValue(null, builder);
             writeIndexField.SetValue(null, 0);
+            primeCountField.SetValue(null, 0);
+            primeFoundField.SetValue(null, false);
+            consoleCounterField.SetValue(null, 0);
 
             printResult.Invoke(null, new object[] { 9UL, false, false, false });
 
-            builder.Length.Should().Be(0);
+            builder.ToString().Should().BeEmpty();
             ((int)writeIndexField.GetValue(null)!).Should().Be(0);
+
+            printResult.Invoke(null, new object[] { 11UL, true, false, true });
+
+            builder.ToString().Should().Be("11,True,False,True" + Environment.NewLine);
+            ((int)writeIndexField.GetValue(null)!).Should().Be(1);
         }
         finally
         {
@@ -432,6 +446,9 @@ public class ProgramTests
             writeIndexField.SetValue(null, previousWriteIndex);
             residueModeField.SetValue(null, previousResidueMode);
             compositeField.SetValue(null, previousComposite);
+            primeCountField.SetValue(null, previousPrimeCount);
+            primeFoundField.SetValue(null, previousPrimeFound);
+            consoleCounterField.SetValue(null, previousConsoleCounter);
             builder.Clear();
             StringBuilderPool.Return(builder);
         }

EvenPerfectBitScanner/Program.cs

@@ -836,28 +836,25 @@ internal static class Program
 			}
 		}
 
-		if (_useResidueMode && _lastCompositeP)
+                bool lastWasComposite = _lastCompositeP;
-		{
-			return;
-		}
-
                 bool primeFlag = false, printToConsole = false;
 
-		StringBuilder localBuilder = StringBuilderPool.Rent();
+                StringBuilder? localBuilder = passedAllTests ? StringBuilderPool.Rent() : null;
+                if (localBuilder is not null)
+                {
                         _ = localBuilder
                                 .Append(currentP).Append(',')
                                 .Append(searchedMersenne).Append(',')
                                 .Append(detailedCheck).Append(',')
                                 .Append(passedAllTests).Append('\n');
+                }
 
                 lock (Sync)
                 {
-			_ = _outputBuilder!.Append(localBuilder);
-
                         if (_consoleCounter >= ConsoleInterval)
                         {
                                 printToConsole = true;
-				primeFlag = _primeFoundAfterInit;
+                                primeFlag = passedAllTests && !lastWasComposite && _primeFoundAfterInit;
                                 _consoleCounter = 0;
                         }
                         else
@@ -865,14 +862,21 @@ internal static class Program
                                 _consoleCounter++;
                         }
 
+                        if (localBuilder is not null)
+                        {
+                                _ = _outputBuilder!.Append(localBuilder);
+
                                 _writeIndex++;
                                 if (_writeIndex >= _writeBatchSize)
                                 {
                                         FlushBuffer();
                                 }
                         }
+                }
 
                 if (printToConsole)
+                {
+                        if (localBuilder is not null)
                         {
                                 if (primeFlag)
                                 {
@@ -884,9 +888,18 @@ internal static class Program
 
                                 Console.WriteLine(localBuilder.Remove(localBuilder.Length - 1, 1).ToString());
                         }
+                        else
+                        {
+                                Console.WriteLine($"{currentP},{searchedMersenne},{detailedCheck},{passedAllTests}");
+                        }
+                }
 
+                if (localBuilder is not null)
+                {
+                        localBuilder.Clear();
                         StringBuilderPool.Return(localBuilder);
                 }
+        }
 
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	private static void FlushBuffer()