diff --git a/src/bin/d17p1.rs b/src/bin/d17p1.rs
index aa51bba..081ca1f 100644
--- a/src/bin/d17p1.rs
+++ b/src/bin/d17p1.rs
@@ -1,4 +1,9 @@
-use std::{collections::{HashMap, HashSet}, process::exit, thread, time::Duration};
+use std::{
+    collections::{HashMap, HashSet},
+    process::exit,
+    thread,
+    time::Duration,
+};
 
 use advent_of_code_2024::{make_main, SResult};
 use regex::Regex;
@@ -124,29 +129,22 @@ fn solve(lines: Vec<String>) -> SResult<(usize, usize)> {
     let pool = ThreadPool::new(20);
     //let mut n = 3536000000;
     let mut n = 0;
+    let mut prev_best = 0;
     let program: &'static mut [usize] = program.leak();
     loop {
-        {
-            let n = n;
-            let program: &'static [usize] = program;
-            pool.execute(move || {
-                let values = State::new(&program, [n, 0, 0]).run_to_end();
-                if values.len() > 4 {
-                    println!("{} => {:?}", n, values);
-                }
-                while &values == program {
-                    println!("finished at {}", n);
-                    //exit(n as i32);
-                }
-            });
+        let values = State::new(&program, [n, 0, 0]).run_to_end();
+        if values.len() > prev_best {
+            println!("{} => {:?}", n, values);
+            prev_best = values.len();
+        }
+        while &values == program {
+            println!("finished at {}", n);
+            //exit(n as i32);
         }
         n += 1;
         if n % 1000000 == 0 {
             println!("n = {}", n);
         }
-        while pool.queued_count() > 10000 {
-            thread::sleep(Duration::from_millis(10));
-        }
     }
     Ok((values.len(), n))
 }