diff --git a/btc-address/src/main.rs b/btc-address/src/main.rs
index 12a43eb..0dc6c24 100644
--- a/btc-address/src/main.rs
+++ b/btc-address/src/main.rs
@@ -1,3 +1,4 @@
+use std::thread;
 use rand::rngs::OsRng;
 use secp256k1::{Secp256k1, key::PublicKey, };
 use sha2::Sha256;
@@ -5,6 +6,20 @@ use ripemd160::Ripemd160;
 use digest::{ Input, FixedOutput, };
 
 fn main() {
+    let mut handles = vec![];
+    for ind in 0..8 {
+        let child = thread::spawn(move || {
+            run_one_task(ind);
+        });
+        handles.push(child);
+    }
+    while let Some(h) = handles.pop() {
+        h.join().unwrap();
+    }
+    println!("Finished!");
+}
+
+fn run_one_task(ind: usize) {
     let secp = Secp256k1::new();
     let mut rng = OsRng::new().expect("OsRng");
 
@@ -14,9 +29,9 @@ fn main() {
         let s = make_btc_address(&public_key);
 
         if i > 0 && i % 10000 == 0 {
-            println!("> {}", i);
+            println!("> {} - {}", ind, i);
         }
-        if s.starts_with("100") {
+        if s.starts_with("1Hatt") {
             println!("{}", s);
             println!("{}", secret_key);
         }