diff --git a/app/src/main/java/Programs/Factorial.java b/app/src/main/java/Programs/Factorial.java
index bc5fb38..46830bf 100644
--- a/app/src/main/java/Programs/Factorial.java
+++ b/app/src/main/java/Programs/Factorial.java
@@ -2,6 +2,7 @@ package Programs;
 
 import hatelace.*;
 import hatelace.instructions.*;
+import hatelace.memtypes.IntWord;
 
 public class Factorial extends Program {
     public Factorial() {
diff --git a/app/src/main/java/Programs/LongFactorial.java b/app/src/main/java/Programs/LongFactorial.java
new file mode 100644
index 0000000..7990354
--- /dev/null
+++ b/app/src/main/java/Programs/LongFactorial.java
@@ -0,0 +1,21 @@
+package Programs;
+
+import hatelace.*;
+import hatelace.instructions.*;
+import hatelace.memtypes.LongWord;
+
+public class LongFactorial extends Program {
+    public LongFactorial() {
+        Address n = new Address(0),
+                fac = new Address(1);
+
+        add(new Copy(new LongWord(5L), n));
+        add(new Copy(new LongWord(1L), fac));
+        add(new JumpEq(6, n, new LongWord(1L)));
+        add(new Mul(fac, n, fac));
+        add(new Add(n, new LongWord(-1L), n));
+        add(new Jump(2));
+        add(new Print(fac));
+        add(new Halt());
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/hatelace/Main.java b/app/src/main/java/hatelace/Main.java
index 9dcb7f1..d380b1d 100644
--- a/app/src/main/java/hatelace/Main.java
+++ b/app/src/main/java/hatelace/Main.java
@@ -1,14 +1,15 @@
 package hatelace;
 
-import Programs.Factorial;
+import Programs.*; // LongFactorial, Factorial
+import hatelace.memtypes.*; // LongWord, IntWord, LongMemory, IntMemory
 
 public class Main {
     public static void main(String[] args) {
         System.out.println("Starting...");
 
-        Memory memory = new IntMemory(64); // 64 words of memory
+        Memory memory = new LongMemory(64); // 64 words of memory
         Computer computer = new Computer(memory);
-        Program program = new Factorial();
+        Program program = new LongFactorial();
 
         computer.load(program);
         computer.run();
diff --git a/app/src/main/java/hatelace/Word.java b/app/src/main/java/hatelace/Word.java
index 6ee37e8..db74dbc 100644
--- a/app/src/main/java/hatelace/Word.java
+++ b/app/src/main/java/hatelace/Word.java
@@ -1,7 +1,7 @@
 package hatelace;
 
 public abstract class Word {
-    public abstract Integer getValue();
+    public abstract <T> T getValue();
     public abstract Word add(Word other);
     public abstract Word subtract(Word other);
     public abstract Word multiply(Word other);
diff --git a/app/src/main/java/hatelace/IntMemory.java b/app/src/main/java/hatelace/memtypes/IntMemory.java
similarity index 91%
rename from app/src/main/java/hatelace/IntMemory.java
rename to app/src/main/java/hatelace/memtypes/IntMemory.java
index 07f46c0..3b83b72 100644
--- a/app/src/main/java/hatelace/IntMemory.java
+++ b/app/src/main/java/hatelace/memtypes/IntMemory.java
@@ -1,4 +1,8 @@
-package hatelace;
+package hatelace.memtypes;
+
+import hatelace.Address;
+import hatelace.Memory;
+import hatelace.Word;
 
 public class IntMemory extends Memory {
     protected int[] memory;
diff --git a/app/src/main/java/hatelace/IntWord.java b/app/src/main/java/hatelace/memtypes/IntWord.java
similarity index 88%
rename from app/src/main/java/hatelace/IntWord.java
rename to app/src/main/java/hatelace/memtypes/IntWord.java
index 4db7f87..a3265a4 100644
--- a/app/src/main/java/hatelace/IntWord.java
+++ b/app/src/main/java/hatelace/memtypes/IntWord.java
@@ -1,4 +1,6 @@
-package hatelace;
+package hatelace.memtypes;
+
+import hatelace.Word;
 
 public class IntWord extends Word {
     private Integer value;
@@ -8,6 +10,7 @@ public class IntWord extends Word {
     }
 
     @Override
+    @SuppressWarnings("unchecked") // Yes, this is a hack.
     public Integer getValue() {
         return value;
     }
diff --git a/app/src/main/java/hatelace/memtypes/LongMemory.java b/app/src/main/java/hatelace/memtypes/LongMemory.java
new file mode 100644
index 0000000..cdb0222
--- /dev/null
+++ b/app/src/main/java/hatelace/memtypes/LongMemory.java
@@ -0,0 +1,47 @@
+package hatelace.memtypes;
+
+import hatelace.Address;
+import hatelace.Memory;
+import hatelace.Word;
+
+public class LongMemory extends Memory {
+    protected long[] memory;
+
+    public LongMemory() {
+        this.memory = new long[256];
+    }
+
+    public LongMemory(int size) {
+        this.memory = new long[size];
+    }
+
+    public Word read(Address address) {
+        return new LongWord(this.memory[address.getAddress()]);
+    }
+
+    public int size() {
+        return this.memory.length;
+    }
+
+    public void write(Address address, Word data) {
+        this.memory[address.getAddress()] = data.getValue();
+    }
+
+    /** Dump as IHEX-like format (see https://en.wikipedia.org/wiki/Longel_HEX) */
+    public void dump() {
+        for(int i = 0; i < this.memory.length; i+= 16) {
+            System.out.printf(":%02X%04X00 ", 16, i);
+            for(int j = 0; j < 16; j++) {
+                long content = this.memory[i + j];
+
+                // Print it as faded if it's zero
+                if (content == 0)
+                    System.out.print("\u001B[2m");
+
+                System.out.printf("%02X ", this.memory[i + j]);
+                System.out.print("\u001B[0m");
+            }
+            System.out.println();
+        }
+    }
+}
diff --git a/app/src/main/java/hatelace/memtypes/LongWord.java b/app/src/main/java/hatelace/memtypes/LongWord.java
new file mode 100644
index 0000000..a7bf783
--- /dev/null
+++ b/app/src/main/java/hatelace/memtypes/LongWord.java
@@ -0,0 +1,41 @@
+package hatelace.memtypes;
+
+import hatelace.Word;
+
+public class LongWord extends Word {
+    private Long value;
+
+    public LongWord(Long value) {
+        this.value = value;
+    }
+
+    @Override
+    @SuppressWarnings("unchecked") // Not a good look
+    public Long getValue() {
+        return value;
+    }
+
+    public Word add(Word other) {
+        return new LongWord(value + (Long) other.getValue());
+    }
+
+    public Word subtract(Word other) {
+        return new LongWord(value - (Long) other.getValue());
+    }
+
+    public Word multiply(Word value) {
+        return new LongWord(this.value * (Long) value.getValue());
+    }
+
+    public Word divide(Word other) {
+        return new LongWord(value / (Long) other.getValue());
+    }
+
+    public String toString() {
+        return value.toString();
+    }
+
+    public boolean equals(Object other) {
+        return value.equals(((LongWord) other).getValue());
+    }
+}