diff --git a/src/bigint.rs b/src/bigint.rs
index 0e4341d..5a457d1 100644
--- a/src/bigint.rs
+++ b/src/bigint.rs
@@ -15,6 +15,17 @@ pub struct BigInt {
     sign: Sign,
 }
 
+/// Create a [BigInt](bigint/struct.BigInt.html) type with signed or unsigned number literals
+#[macro_export]
+macro_rules! big_int {
+    ($w:literal) => {
+        $crate::bigint::BigInt::from($w)
+    };
+    (-$x:literal) => {
+        $crate::bigint::BigInt::from(-$x)
+    };
+}
+
 impl Default for BigInt {
     fn default() -> Self {
         Self {
@@ -439,6 +450,17 @@ mod tests {
         assert_eq!(int.inner[0], 45usize)
     }
 
+    #[test]
+    fn test_macro() {
+        let a = big_int!(75);
+        let b = BigInt::from(75);
+        assert_eq!(a, b);
+
+        let a = big_int!(-75);
+        let b = BigInt::from(-75);
+        assert_eq!(a, b);
+    }
+
     #[test]
     fn test_trim_zeros() {
         let mut lotsoftrailing = BigInt {
diff --git a/src/num.rs b/src/num.rs
index 8764ad5..c080e89 100644
--- a/src/num.rs
+++ b/src/num.rs
@@ -160,7 +160,6 @@ macro_rules! impl_int {
                     self == 0
                 }
 
-                #[cfg_attr(tarpaulin, skip)]
                 fn max_value() -> $type {
                     <$type>::max_value()
                 }
@@ -253,7 +252,6 @@ macro_rules! impl_unsigned {
                             let (x, y) = (min(x, y), max(x, y));
                             Self::stein_gcd((y - x) >> 1, x)
                         }
-                        #[cfg_attr(tarpaulin, skip)]
                         _ => unreachable!(),
                     }
                 }