diff --git a/src/uu/factor/src/factor.rs b/src/uu/factor/src/factor.rs
index a4ff91ba8fb..4c3cdcf7451 100644
--- a/src/uu/factor/src/factor.rs
+++ b/src/uu/factor/src/factor.rs
@@ -1,10 +1,7 @@
 // * This file is part of the uutils coreutils package.
 // *
-// * (c) T. Jameson Little <t.jameson.little@gmail.com>
-// * (c) Wiktor Kuropatwa <wiktor.kuropatwa@gmail.com>
-// *     * 2015-02-23 ~ added Pollard rho method implementation
-// * (c) kwantam <kwantam@gmail.com>
-// *     * 2015-04-29 ~ sped up trial division by adding table of prime inverses
+// * (c) 2014 T. Jameson Little <t.jameson.little@gmail.com>
+// * (c) 2020 nicoo <nicoo@debian.org>
 // *
 // * For the full copyright and license information, please view the LICENSE file
 // * that was distributed with this source code.
diff --git a/src/uu/factor/src/numeric.rs b/src/uu/factor/src/numeric.rs
index 4e0cee0724b..e95fd194848 100644
--- a/src/uu/factor/src/numeric.rs
+++ b/src/uu/factor/src/numeric.rs
@@ -1,8 +1,7 @@
 // * This file is part of the uutils coreutils package.
 // *
-// * (c) Wiktor Kuropatwa <wiktor.kuropatwa@gmail.com>
-// * (c) kwantam <kwantam@gmail.com>
-// *     * 20150507 ~ added big_ routines to prevent overflow when num > 2^63
+// * (c) 2015 Wiktor Kuropatwa <wiktor.kuropatwa@gmail.com>
+// * (c) 2020 nicoo            <nicoo@debian.org>
 // *
 // * For the full copyright and license information, please view the LICENSE file
 // * that was distributed with this source code.
diff --git a/src/uu/factor/src/rho.rs b/src/uu/factor/src/rho.rs
index 5416218e166..f15ef5468cc 100644
--- a/src/uu/factor/src/rho.rs
+++ b/src/uu/factor/src/rho.rs
@@ -1,3 +1,11 @@
+// * This file is part of the uutils coreutils package.
+// *
+// * (c) 2015 Wiktor Kuropatwa <wiktor.kuropatwa@gmail.com>
+// * (c) 2020 nicoo <nicoo@debian.org>
+// *
+// * For the full copyright and license information, please view the LICENSE file
+// * that was distributed with this source code.
+
 use rand::distributions::{Distribution, Uniform};
 use rand::rngs::SmallRng;
 use rand::{thread_rng, SeedableRng};
diff --git a/src/uu/factor/src/table.rs b/src/uu/factor/src/table.rs
index f62b7c63a99..6c59d3f0788 100644
--- a/src/uu/factor/src/table.rs
+++ b/src/uu/factor/src/table.rs
@@ -1,3 +1,11 @@
+// * This file is part of the uutils coreutils package.
+// *
+// * (c) 2015 kwantam <kwantam@gmail.com>
+// * (c) 2020 nicoo   <nicoo@debian.org>
+// *
+// * For the full copyright and license information, please view the LICENSE file
+// * that was distributed with this source code.
+
 // spell-checker: ignore (ToDO) INVS
 
 use std::num::Wrapping;