diff --git a/src/main.rs b/src/main.rs
index 61dc4b4..38f981d 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -687,33 +687,16 @@ struct HunkHeader {
     plus_range: (usize, usize),
 }
 
-const WIDTH: [u64; 20] = [
-    0,
-    9,
-    99,
-    999,
-    9999,
-    99999,
-    999999,
-    9999999,
-    99999999,
-    999999999,
-    9999999999,
-    99999999999,
-    999999999999,
-    9999999999999,
-    99999999999999,
-    999999999999999,
-    9999999999999999,
-    99999999999999999,
-    999999999999999999,
-    9999999999999999999,
-];
-
 fn width1(x: u64, st: Option<LineNumberStyle>) -> usize {
-    let result = WIDTH.binary_search(&x);
-    let result = match result {
-        Ok(i) | Err(i) => i,
+    let result = if x == 0 {
+        0
+    } else {
+        let mut counter = 1;
+        let mut x = x;
+        while x >= 10 {
+            (x, counter) = (x / 10, counter + 1);
+        }
+        counter
     };
     st.map(|style| style.min_width()).unwrap_or(0).max(result)
 }
diff --git a/src/tests_app.rs b/src/tests_app.rs
index f59eaa5..b9ee3d9 100644
--- a/src/tests_app.rs
+++ b/src/tests_app.rs
@@ -65,11 +65,6 @@ fn parse_line_number_test() {
 
 #[test]
 fn test_width() {
-    for (i, x) in WIDTH.iter().enumerate() {
-        if x < &u64::max_value() {
-            assert_eq!(format!("{}", x + 1).len(), i + 1);
-        }
-    }
     assert_eq!(0, width1(0, None));
     fn test(x: u64) {
         assert_eq!(format!("{}", x).len(), width1(x, None));