diff --git a/src/main/java/com/vectron/fcl/types/Num.java b/src/main/java/com/vectron/fcl/types/Num.java
index 930bf6e..20a70c8 100644
--- a/src/main/java/com/vectron/fcl/types/Num.java
+++ b/src/main/java/com/vectron/fcl/types/Num.java
@@ -32,6 +32,8 @@ public class Num implements Obj, LogicOperand, ArithmeticOperand {
         try {
             if (str.startsWith("0x"))
                 return new Num(Long.parseLong(str.substring(2), 16));
+            else if (str.startsWith("0b"))
+                return new Num(Long.parseLong(str.substring(2), 2));
             return new Num(Long.parseLong(str));
         } catch (NumberFormatException e1) {
             try {
diff --git a/src/test/java/com/vectron/fcl/FclTest.java b/src/test/java/com/vectron/fcl/FclTest.java
index 4642459..db7151b 100644
--- a/src/test/java/com/vectron/fcl/FclTest.java
+++ b/src/test/java/com/vectron/fcl/FclTest.java
@@ -91,7 +91,14 @@ public class FclTest {
         assertEquals(asList(1l, 85l), evalGetStack("2 8 pow 3 /mod"));
         assertEquals(3, evalPop("10 3 /mod nip").intValue());
         assertEquals(1, evalPop("10 3 /mod drop").intValue());
+    }
 
+    @Test
+    public void testNumberLiterals() {
+        assertEquals(12345, evalPop("12345").longValue());
+        assertEquals(255, evalPop("0xFF").longValue());
+        assertEquals(131, evalPop("0b10000011").longValue());
+        assertEquals(-1.44, evalPop("-1.44").doubleValue(), 0.01);
     }
 
     @Test