diff --git a/Cargo.lock b/Cargo.lock
index d801ed1..57c7f83 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -338,5 +338,6 @@ version = "0.1.0"
 dependencies = [
  "advent_core",
  "macros",
+ "rayon",
  "utils",
 ]
diff --git a/years/2025/Cargo.toml b/years/2025/Cargo.toml
index 6fb50c4..e025283 100644
--- a/years/2025/Cargo.toml
+++ b/years/2025/Cargo.toml
@@ -7,4 +7,5 @@ edition = "2024"
 [dependencies]
 advent_core = { path = "../../advent_core" }
 macros = { path = "../../macros" }
+rayon = "1.11.0"
 utils = { path = "../../utils" }
diff --git a/years/2025/src/day_2.rs b/years/2025/src/day_2.rs
index 00430bc..3e861c2 100644
--- a/years/2025/src/day_2.rs
+++ b/years/2025/src/day_2.rs
@@ -1,17 +1,61 @@
+use std::ops::RangeInclusive;
 
 use advent_core::{Day, day_stuff, ex_for_day};
+use utils::num::{num_digits, split_num_at, split_num_once};
 
 pub struct Day2;
 
 impl Day for Day2 {
+    day_stuff!(2, "1227775554", "4174379265", Vec<RangeInclusive<usize>>);
 
-    day_stuff!(2, "", "");
+    fn part_1(input: Self::Input) -> Option<String> {
+        let ans = input
+            .into_iter()
+            .flat_map(|r| {
+                r.into_iter().filter(|x| {
+                    let (l, r) = split_num_once(*x);
+                    l == r
+                })
+            })
+            .sum::<usize>();
 
-    fn part_1(_input: Self::Input) -> Option<String> {
-        None
+        Some(ans.to_string())
     }
 
-    fn part_2(_input: Self::Input) -> Option<String> {
-        None
+    fn part_2(input: Self::Input) -> Option<String> {
+        let ans = input
+            .into_iter()
+            .flat_map(|r| {
+                r.into_iter().filter(|x| {
+                    let digs = num_digits(*x);
+                    (2..=digs).into_iter().filter(|n| digs % n == 0).any(|n| {
+                        let mut parts = Vec::with_capacity(n);
+                        let mut current = *x;
+                        let split_at = digs / n;
+                        for _ in 0..n {
+                            let (rest, part) = split_num_at(current, split_at as u32);
+                            parts.push(part);
+                            current = rest;
+                        }
+                        parts
+                            .first()
+                            .copied()
+                            .map_or(false, |first| parts.into_iter().all(|x| x == first))
+                    })
+                })
+            })
+            .sum::<usize>();
+
+        Some(ans.to_string())
+    }
+
+    fn parse_input(input: &str) -> Self::Input {
+        input
+            .split(',')
+            .map(|r| {
+                let (l, r) = r.split_once('-').unwrap();
+                (l.trim().parse::<usize>().unwrap())..=(r.trim().parse::<usize>().unwrap())
+            })
+            .collect()
     }
 }
diff --git a/years/2025/src/examples/day_2/1.txt b/years/2025/src/examples/day_2/1.txt
index e69de29..b5e6998 100644
--- a/years/2025/src/examples/day_2/1.txt
+++ b/years/2025/src/examples/day_2/1.txt
@@ -0,0 +1,3 @@
+11-22,95-115,998-1012,1188511880-1188511890,222220-222224,
+1698522-1698528,446443-446449,38593856-38593862,565653-565659,
+824824821-824824827,2121212118-2121212124
diff --git a/years/2025/src/examples/day_2/2.txt b/years/2025/src/examples/day_2/2.txt
index e69de29..b5e6998 100644
--- a/years/2025/src/examples/day_2/2.txt
+++ b/years/2025/src/examples/day_2/2.txt
@@ -0,0 +1,3 @@
+11-22,95-115,998-1012,1188511880-1188511890,222220-222224,
+1698522-1698528,446443-446449,38593856-38593862,565653-565659,
+824824821-824824827,2121212118-2121212124