diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 32f656b6ed..8c6fa47048 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -4,9 +4,11 @@
     <option name="autoReloadType" value="SELECTIVE" />
   </component>
   <component name="ChangeListManager">
-    <list default="true" id="2a855b03-5ee0-4324-b916-110994784a14" name="Changes" comment="Update change to different folder and set to rebuild">
+    <list default="true" id="2a855b03-5ee0-4324-b916-110994784a14" name="Changes" comment="Init commit all code">
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/parent-java/java-numbers-2/README.md" beforeDir="false" afterPath="$PROJECT_DIR$/parent-java/java-numbers-2/README.md" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/parent-java/java-numbers-2/src/test/java/com/ossez/prime/PrimeGeneratorUnitTest.java" beforeDir="false" afterPath="$PROJECT_DIR$/parent-java/java-numbers-2/src/test/java/com/ossez/prime/PrimeGeneratorUnitTest.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/toolkits/codebank/src/test/java/com/ossez/toolkits/codebank/tests/algorithm/PrimeNumbersTest.java" beforeDir="false" afterPath="$PROJECT_DIR$/toolkits/codebank/src/test/java/com/ossez/toolkits/codebank/tests/algorithm/PrimeNumbersTest.java" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
@@ -31,7 +33,7 @@
     <property name="node.js.selected.package.eslint" value="(autodetect)" />
     <property name="node.js.selected.package.tslint" value="(autodetect)" />
   </component>
-  <component name="RunManager" selected="Application.NaNExample">
+  <component name="RunManager" selected="JUnit.PrimeNumbersTest.testIsPrime">
     <configuration name="NaNExample" type="Application" factoryName="Application" temporary="true" nameIsGenerated="true">
       <option name="MAIN_CLASS_NAME" value="com.ossez.nan.NaNExample" />
       <module name="java-numbers-2" />
@@ -77,6 +79,38 @@
         <option name="Make" enabled="true" />
       </method>
     </configuration>
+    <configuration name="PrimeNumbersTest.testIsPrime" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+      <module name="codebank" />
+      <extension name="coverage">
+        <pattern>
+          <option name="PATTERN" value="com.ossez.toolkits.codebank.tests.algorithm.*" />
+          <option name="ENABLED" value="true" />
+        </pattern>
+      </extension>
+      <option name="PACKAGE_NAME" value="com.ossez.toolkits.codebank.tests.algorithm" />
+      <option name="MAIN_CLASS_NAME" value="com.ossez.toolkits.codebank.tests.algorithm.PrimeNumbersTest" />
+      <option name="METHOD_NAME" value="testIsPrime" />
+      <option name="TEST_OBJECT" value="method" />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
+    </configuration>
+    <configuration name="PrimeNumbersTest.testIsPrimeCore" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+      <module name="codebank" />
+      <extension name="coverage">
+        <pattern>
+          <option name="PATTERN" value="com.ossez.toolkits.codebank.tests.algorithm.*" />
+          <option name="ENABLED" value="true" />
+        </pattern>
+      </extension>
+      <option name="PACKAGE_NAME" value="com.ossez.toolkits.codebank.tests.algorithm" />
+      <option name="MAIN_CLASS_NAME" value="com.ossez.toolkits.codebank.tests.algorithm.PrimeNumbersTest" />
+      <option name="METHOD_NAME" value="testIsPrimeCore" />
+      <option name="TEST_OBJECT" value="method" />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
+    </configuration>
     <configuration default="true" type="JetRunConfigurationType">
       <method v="2">
         <option name="Make" enabled="true" />
@@ -90,6 +124,8 @@
     </configuration>
     <recent_temporary>
       <list>
+        <item itemvalue="JUnit.PrimeNumbersTest.testIsPrime" />
+        <item itemvalue="JUnit.PrimeNumbersTest.testIsPrimeCore" />
         <item itemvalue="Application.NaNExample" />
         <item itemvalue="JUnit.PrimeCheckerUnitTest.whenCheckIsPrime_thenTrue" />
       </list>
@@ -104,7 +140,7 @@
       <option name="presentableId" value="Default" />
       <updated>1632408056518</updated>
       <workItem from="1632408057926" duration="1144000" />
-      <workItem from="1632417263821" duration="2908000" />
+      <workItem from="1632417263821" duration="5653000" />
     </task>
     <task id="LOCAL-00001" summary="修改项目到不同的路径">
       <created>1632420206392</created>
@@ -120,7 +156,28 @@
       <option name="project" value="LOCAL" />
       <updated>1632420268850</updated>
     </task>
-    <option name="localTasksCounter" value="3" />
+    <task id="LOCAL-00003" summary="Java number related and examples">
+      <created>1632423632011</created>
+      <option name="number" value="00003" />
+      <option name="presentableId" value="LOCAL-00003" />
+      <option name="project" value="LOCAL" />
+      <updated>1632423632011</updated>
+    </task>
+    <task id="LOCAL-00004" summary="Init commit all code">
+      <created>1632423824690</created>
+      <option name="number" value="00004" />
+      <option name="presentableId" value="LOCAL-00004" />
+      <option name="project" value="LOCAL" />
+      <updated>1632423824690</updated>
+    </task>
+    <task id="LOCAL-00005" summary="Init commit all code">
+      <created>1632423847987</created>
+      <option name="number" value="00005" />
+      <option name="presentableId" value="LOCAL-00005" />
+      <option name="project" value="LOCAL" />
+      <updated>1632423847987</updated>
+    </task>
+    <option name="localTasksCounter" value="6" />
     <servers />
   </component>
   <component name="TypeScriptGeneratedFilesManager">
@@ -140,6 +197,8 @@
   <component name="VcsManagerConfiguration">
     <MESSAGE value="修改项目到不同的路径" />
     <MESSAGE value="Update change to different folder and set to rebuild" />
-    <option name="LAST_COMMIT_MESSAGE" value="Update change to different folder and set to rebuild" />
+    <MESSAGE value="Java number related and examples" />
+    <MESSAGE value="Init commit all code" />
+    <option name="LAST_COMMIT_MESSAGE" value="Init commit all code" />
   </component>
 </project>
\ No newline at end of file
diff --git a/parent-java/java-numbers-2/README.md b/parent-java/java-numbers-2/README.md
index d29b9e1809..d99babb42b 100644
--- a/parent-java/java-numbers-2/README.md
+++ b/parent-java/java-numbers-2/README.md
@@ -9,7 +9,7 @@
 - [Java 中的 NaN](https://www.ossez.com/t/java-nan/13748)
 - [Generating Prime Numbers in Java](https://www.baeldung.com/java-generate-prime-numbers)
 - [Using Math.pow in Java](https://www.baeldung.com/java-math-pow)
-- [Check If a Number Is Prime in Java](https://www.baeldung.com/java-prime-numbers)
+- [如何用 Java 判断一个给定的数是不是素数](https://www.ossez.com/t/java/13749)
 - [Binary Numbers in Java](https://www.baeldung.com/java-binary-numbers)
 - [Finding the Least Common Multiple in Java](https://www.baeldung.com/java-least-common-multiple)
 - [Binary Numbers in Java](https://www.baeldung.com/java-binary-numbers)
diff --git a/parent-java/java-numbers-2/src/test/java/com/ossez/prime/PrimeGeneratorUnitTest.java b/parent-java/java-numbers-2/src/test/java/com/ossez/prime/PrimeGeneratorUnitTest.java
index 543aac7d88..53c0aac842 100644
--- a/parent-java/java-numbers-2/src/test/java/com/ossez/prime/PrimeGeneratorUnitTest.java
+++ b/parent-java/java-numbers-2/src/test/java/com/ossez/prime/PrimeGeneratorUnitTest.java
@@ -1,7 +1,9 @@
 package com.ossez.prime;
 
+import org.apache.commons.math3.primes.Primes;
 import org.junit.Test;
 
+import java.math.BigInteger;
 import java.util.Arrays;
 import java.util.List;
 
@@ -25,5 +27,6 @@ public class PrimeGeneratorUnitTest {
     public void whenSieveOfEratosthenes_returnsSuccessfully() {
         final List<Integer> primeNumbers = sieveOfEratosthenes(20);
         assertEquals(Arrays.asList(new Integer[] { 2, 3, 5, 7, 11, 13, 17, 19 }), primeNumbers);
+        BigInteger bigInt = BigInteger.valueOf(100);
     }
 }
diff --git a/toolkits/codebank/src/test/java/com/ossez/toolkits/codebank/tests/algorithm/PrimeNumbersTest.java b/toolkits/codebank/src/test/java/com/ossez/toolkits/codebank/tests/algorithm/PrimeNumbersTest.java
index 5af079194a..fafaa9e87c 100644
--- a/toolkits/codebank/src/test/java/com/ossez/toolkits/codebank/tests/algorithm/PrimeNumbersTest.java
+++ b/toolkits/codebank/src/test/java/com/ossez/toolkits/codebank/tests/algorithm/PrimeNumbersTest.java
@@ -1,12 +1,16 @@
 package com.ossez.toolkits.codebank.tests.algorithm;
 
+import org.apache.commons.lang3.math.NumberUtils;
+import org.apache.commons.math3.primes.Primes;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.TestInstance;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import java.math.BigInteger;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.stream.IntStream;
 
 /**
  * <p>
@@ -43,6 +47,22 @@ public class PrimeNumbersTest {
         logger.debug("primeNumber Count -[{}]", primeNumberList);
     }
 
+    /**
+     * Prime Number Check Test
+     */
+    @Test
+    public void testIsPrime() {
+        int number = 10;
+        Boolean isPrime = number > 1
+                && IntStream.rangeClosed(2, (int) Math.sqrt(number))
+                .noneMatch(n -> (number % n == 0));
+
+        logger.debug(" {} Prime CORE Check is - [{}]", number, isPrime);
+        logger.debug(" {} Prime BigInteger Check is - [{}]", number, BigInteger.valueOf(number).isProbablePrime(100));
+        logger.debug(" {} Prime APACHE MATH3 Check is - [{}]", number, Primes.isPrime(number));
+    }
+
+
     /**
      * @param number
      * @return