diff --git a/plonky2/examples/factorial.rs b/plonky2/examples/factorial.rs
index bcdb35dc..80bfacb9 100644
--- a/plonky2/examples/factorial.rs
+++ b/plonky2/examples/factorial.rs
@@ -35,7 +35,7 @@ fn main() -> Result<()> {
     let proof = data.prove(pw)?;
 
     println!(
-        "Factorial starting at {} is {}!",
+        "Factorial starting at {} is {}",
         proof.public_inputs[0], proof.public_inputs[1]
     );