diff --git a/.vscode/launch.json b/.vscode/launch.json
index 38a0589..5b56c78 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -20,7 +20,7 @@
       "type": "coreclr",
       "request": "launch",
       "preLaunchTask": "Build Debug",
-      "program": "${workspaceFolder}/${input:projectName}/bin/Debug/net8.0/${input:projectName}.dll",
+      "program": "${workspaceFolder}/${input:projectName}/bin/Debug/net9.0/${input:projectName}.dll",
 			"args": [
 				"--increment=add",
 				"--mersenne=bydivisor",
@@ -47,7 +47,7 @@
       "request": "launch",
       "noDebug": true,
       "preLaunchTask": "Build Release",
-      "program": "${workspaceFolder}/${input:projectName}/bin/Release/net8.0/${input:projectName}.dll",
+      "program": "${workspaceFolder}/${input:projectName}/bin/Release/net9.0/${input:projectName}.dll",
       "args": [],
       "cwd": "${workspaceFolder}",
       "stopAtEntry": false,
@@ -61,7 +61,7 @@
       "request": "launch",
       "noDebug": true,
       "preLaunchTask": "Build EvenPerfectBitScanner Release",
-      "program": "${workspaceFolder}/EvenPerfectBitScanner/bin/Release/net8.0/EvenPerfectBitScanner.dll",
+      "program": "${workspaceFolder}/EvenPerfectBitScanner/bin/Release/net9.0/EvenPerfectBitScanner.dll",
       "args": [],
       "cwd": "${workspaceFolder}",
       "stopAtEntry": false,
@@ -75,7 +75,7 @@
       "request": "launch",
       "noDebug": true,
       "preLaunchTask": "Build BuildDivisorTransitions Release",
-      "program": "${workspaceFolder}/BuildDivisorTransitions/bin/Release/net8.0/BuildDivisorTransitions.dll",
+      "program": "${workspaceFolder}/BuildDivisorTransitions/bin/Release/net9.0/BuildDivisorTransitions.dll",
       "args": [],
       "cwd": "${workspaceFolder}",
       "stopAtEntry": false,
@@ -88,7 +88,7 @@
       "type": "coreclr",
       "request": "launch",
       "preLaunchTask": "Build BuildDivisorTransitions Debug",
-      "program": "${workspaceFolder}/BuildDivisorTransitions/bin/Debug/net8.0/BuildDivisorTransitions.dll",
+      "program": "${workspaceFolder}/BuildDivisorTransitions/bin/Debug/net9.0/BuildDivisorTransitions.dll",
       "args": [],
       "cwd": "${workspaceFolder}",
       "stopAtEntry": false,
@@ -102,7 +102,7 @@
       "request": "launch",
       "noDebug": true,
       "preLaunchTask": "Build EvenPerfectBitScanner.ResultsParser Release",
-      "program": "${workspaceFolder}/EvenPerfectBitScanner.ResultsParser/bin/Release/net8.0/EvenPerfectBitScanner.ResultsParser.dll",
+      "program": "${workspaceFolder}/EvenPerfectBitScanner.ResultsParser/bin/Release/net9.0/EvenPerfectBitScanner.ResultsParser.dll",
       "args": [],
       "cwd": "${workspaceFolder}",
       "stopAtEntry": false,
@@ -115,7 +115,7 @@
       "type": "coreclr",
       "request": "launch",
       "preLaunchTask": "Build EvenPerfectBitScanner Debug",
-      "program": "${workspaceFolder}/EvenPerfectBitScanner/bin/Debug/net8.0/EvenPerfectBitScanner.dll",
+      "program": "${workspaceFolder}/EvenPerfectBitScanner/bin/Debug/net9.0/EvenPerfectBitScanner.dll",
       "args": [],
       "cwd": "${workspaceFolder}",
       "stopAtEntry": false,
@@ -128,7 +128,7 @@
       "type": "coreclr",
       "request": "launch",
       "preLaunchTask": "Build EvenPerfectBitScanner.ResultsParser Debug",
-      "program": "${workspaceFolder}/EvenPerfectBitScanner.ResultsParser/bin/Debug/net8.0/EvenPerfectBitScanner.ResultsParser.dll",
+      "program": "${workspaceFolder}/EvenPerfectBitScanner.ResultsParser/bin/Debug/net9.0/EvenPerfectBitScanner.ResultsParser.dll",
       "args": [],
       "cwd": "${workspaceFolder}",
       "stopAtEntry": false,
@@ -142,7 +142,7 @@
       "request": "launch",
       "noDebug": true,
       "preLaunchTask": "Build EvenPerfectBitScanner.Benchmarks Release",
-      "program": "${workspaceFolder}/EvenPerfectBitScanner.Benchmarks/bin/Release/net8.0/EvenPerfectBitScanner.Benchmarks.dll",
+      "program": "${workspaceFolder}/EvenPerfectBitScanner.Benchmarks/bin/Release/net9.0/EvenPerfectBitScanner.Benchmarks.dll",
       "args": [],
       "cwd": "${workspaceFolder}",
       "stopAtEntry": false,
@@ -155,7 +155,7 @@
       "type": "coreclr",
       "request": "launch",
       "preLaunchTask": "Build EvenPerfectBitScanner.Benchmarks Debug",
-      "program": "${workspaceFolder}/EvenPerfectBitScanner.Benchmarks/bin/Debug/net8.0/EvenPerfectBitScanner.Benchmarks.dll",
+      "program": "${workspaceFolder}/EvenPerfectBitScanner.Benchmarks/bin/Debug/net9.0/EvenPerfectBitScanner.Benchmarks.dll",
       "args": [],
       "cwd": "${workspaceFolder}",
       "stopAtEntry": false,
diff --git a/.vscode/tasks.json b/.vscode/tasks.json
index 9d9e96e..7db194c 100644
--- a/.vscode/tasks.json
+++ b/.vscode/tasks.json
@@ -11,7 +11,7 @@
                                 "--configuration",
                                 "Debug",
                                 "--framework",
-                                "net8.0",
+                                "net9.0",
                                 "/p:DeviceDependentGenerator_CopyGeneratedToProjectDir=true"
                         ],
                         "group": {
@@ -30,7 +30,7 @@
                                 "--configuration",
                                 "Release",
                                 "--framework",
-                                "net8.0",
+                                "net9.0",
                                 "/p:DeviceDependentGenerator_CopyGeneratedToProjectDir=true"
                         ],
                         "group": "build",
@@ -46,7 +46,7 @@
                                 "--configuration",
                                 "Debug",
                                 "--framework",
-                                "net8.0"
+                                "net9.0"
                         ],
                         "group": "build",
                         "problemMatcher": "$msCompile"
@@ -61,7 +61,7 @@
                                 "--configuration",
                                 "Release",
                                 "--framework",
-                                "net8.0"
+                                "net9.0"
                         ],
                         "group": "build",
                         "problemMatcher": "$msCompile"
@@ -76,7 +76,7 @@
                                 "--configuration",
                                 "Debug",
                                 "--framework",
-                                "net8.0"
+                                "net9.0"
                         ],
                         "group": "build",
                         "problemMatcher": "$msCompile"
@@ -91,7 +91,7 @@
                                 "--configuration",
                                 "Release",
                                 "--framework",
-                                "net8.0"
+                                "net9.0"
                         ],
                         "group": "build",
                         "problemMatcher": "$msCompile"
@@ -106,7 +106,7 @@
                                 "--configuration",
                                 "Debug",
                                 "--framework",
-                                "net8.0"
+                                "net9.0"
                         ],
                         "group": "build",
                         "problemMatcher": "$msCompile"
@@ -121,7 +121,7 @@
                                 "--configuration",
                                 "Release",
                                 "--framework",
-                                "net8.0"
+                                "net9.0"
                         ],
                         "group": "build",
                         "problemMatcher": "$msCompile"
@@ -137,7 +137,7 @@
                                 "--configuration",
                                 "Release",
                                 "--framework",
-                                "net8.0"
+                                "net9.0"
                         ],
                         "problemMatcher": []
                 },
@@ -152,7 +152,7 @@
                                 "--configuration",
                                 "Release",
                                 "--framework",
-                                "net8.0"
+                                "net9.0"
                         ],
                         "problemMatcher": []
                 },
@@ -167,7 +167,7 @@
                                 "--configuration",
                                 "Release",
                                 "--framework",
-                                "net8.0"
+                                "net9.0"
                         ],
                         "problemMatcher": []
                 },
@@ -180,7 +180,7 @@
                                 "--configuration",
                                 "Release",
                                 "--framework",
-                                "net8.0"
+                                "net9.0"
                         ],
                         "problemMatcher": []
                 },
@@ -194,7 +194,7 @@
                                 "--configuration",
                                 "Debug",
                                 "--framework",
-                                "net8.0"
+                                "net9.0"
                         ],
                         "group": "build",
                         "problemMatcher": "$msCompile"
@@ -209,7 +209,7 @@
                                 "--configuration",
                                 "Release",
                                 "--framework",
-                                "net8.0"
+                                "net9.0"
                         ],
                         "group": "build",
                         "problemMatcher": "$msCompile"
@@ -225,7 +225,7 @@
                                 "--configuration",
                                 "Release",
                                 "--framework",
-                                "net8.0"
+                                "net9.0"
                         ],
                         "problemMatcher": []
                 }
diff --git a/BuildDivisorTransitions/BuildDivisorTransitions.csproj b/BuildDivisorTransitions/BuildDivisorTransitions.csproj
index 48b2e9e..536260b 100644
--- a/BuildDivisorTransitions/BuildDivisorTransitions.csproj
+++ b/BuildDivisorTransitions/BuildDivisorTransitions.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
     <PropertyGroup>
         <OutputType>Exe</OutputType>
-        <TargetFramework>net8.0</TargetFramework>
+        <TargetFramework>net9.0</TargetFramework>
         <ImplicitUsings>enable</ImplicitUsings>
         <Nullable>enable</Nullable>
     </PropertyGroup>
diff --git a/DeviceDependentGenerator.Tests/DeviceDependentGenerator.Tests.csproj b/DeviceDependentGenerator.Tests/DeviceDependentGenerator.Tests.csproj
index f2b1c05..6fff951 100644
--- a/DeviceDependentGenerator.Tests/DeviceDependentGenerator.Tests.csproj
+++ b/DeviceDependentGenerator.Tests/DeviceDependentGenerator.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <IsPackable>false</IsPackable>
diff --git a/DeviceDependentGenerator/DeviceDependentGenerator.csproj b/DeviceDependentGenerator/DeviceDependentGenerator.csproj
index f4fb1e6..992ec0c 100644
--- a/DeviceDependentGenerator/DeviceDependentGenerator.csproj
+++ b/DeviceDependentGenerator/DeviceDependentGenerator.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netstandard2.0;net8.0</TargetFrameworks>
+    <TargetFramework>net9.0</TargetFramework>
     <LangVersion>latest</LangVersion>
     <Nullable>enable</Nullable>
     <ImplicitUsings>disable</ImplicitUsings>
diff --git a/EvenPerfectBitScanner.Benchmarks/EvenPerfectBitScanner.Benchmarks.csproj b/EvenPerfectBitScanner.Benchmarks/EvenPerfectBitScanner.Benchmarks.csproj
index 1c345e4..ed25ba0 100644
--- a/EvenPerfectBitScanner.Benchmarks/EvenPerfectBitScanner.Benchmarks.csproj
+++ b/EvenPerfectBitScanner.Benchmarks/EvenPerfectBitScanner.Benchmarks.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>
diff --git a/EvenPerfectBitScanner.ResultsParser/EvenPerfectBitScanner.ResultsParser.csproj b/EvenPerfectBitScanner.ResultsParser/EvenPerfectBitScanner.ResultsParser.csproj
index 3bc7595..13991b7 100644
--- a/EvenPerfectBitScanner.ResultsParser/EvenPerfectBitScanner.ResultsParser.csproj
+++ b/EvenPerfectBitScanner.ResultsParser/EvenPerfectBitScanner.ResultsParser.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
   </PropertyGroup>
diff --git a/EvenPerfectBitScanner.Tests/EvenPerfectBitScanner.Tests.csproj b/EvenPerfectBitScanner.Tests/EvenPerfectBitScanner.Tests.csproj
index 97b8c66..d293216 100644
--- a/EvenPerfectBitScanner.Tests/EvenPerfectBitScanner.Tests.csproj
+++ b/EvenPerfectBitScanner.Tests/EvenPerfectBitScanner.Tests.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <IsPackable>false</IsPackable>
diff --git a/EvenPerfectBitScanner/EvenPerfectBitScanner.csproj b/EvenPerfectBitScanner/EvenPerfectBitScanner.csproj
index fcebb40..fed1311 100644
--- a/EvenPerfectBitScanner/EvenPerfectBitScanner.csproj
+++ b/EvenPerfectBitScanner/EvenPerfectBitScanner.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
diff --git a/PerfectNumbers.Core.Tests/PerfectNumbers.Core.Tests.csproj b/PerfectNumbers.Core.Tests/PerfectNumbers.Core.Tests.csproj
index 4b979b2..041647b 100644
--- a/PerfectNumbers.Core.Tests/PerfectNumbers.Core.Tests.csproj
+++ b/PerfectNumbers.Core.Tests/PerfectNumbers.Core.Tests.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <IsPackable>false</IsPackable>
diff --git a/PerfectNumbers.Core/PerfectNumbers.Core.csproj b/PerfectNumbers.Core/PerfectNumbers.Core.csproj
index a9d5fc7..4f581ba 100644
--- a/PerfectNumbers.Core/PerfectNumbers.Core.csproj
+++ b/PerfectNumbers.Core/PerfectNumbers.Core.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <LangVersion>12.0</LangVersion>
@@ -9,6 +9,10 @@
     <EmitCompilerGeneratedFiles>true</EmitCompilerGeneratedFiles>
     <CompilerGeneratedFilesOutputPath>$(IntermediateOutputPath)generated</CompilerGeneratedFilesOutputPath>
 	<!-- <DefineConstants>$(DefineConstants);DETAILED_LOG</DefineConstants> -->
+	<!-- <DefineConstants>$(DefineConstants);INVERSION_VALIDATION</DefineConstants> -->
+	<!-- <DefineConstants>$(DefineConstants);OVERRIDE_MIN_K</DefineConstants> -->
+	<!-- <DefineConstants>$(DefineConstants);SELF_TEST</DefineConstants> -->
+	<!-- <DefineConstants>$(DefineConstants);EXPORT_STAGE</DefineConstants> -->
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/tools/HeuristicMultiplyShiftTiming/HeuristicMultiplyShiftTiming.csproj b/tools/HeuristicMultiplyShiftTiming/HeuristicMultiplyShiftTiming.csproj
index e771e0a..b600868 100644
--- a/tools/HeuristicMultiplyShiftTiming/HeuristicMultiplyShiftTiming.csproj
+++ b/tools/HeuristicMultiplyShiftTiming/HeuristicMultiplyShiftTiming.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
   </PropertyGroup>