diff --git a/Cargo.toml b/Cargo.toml
index 9848e15e9ff..84f241ac384 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -166,6 +166,7 @@ unwrap_used = { level = "allow", priority = 1 }
 use_debug = { level = "allow", priority = 1 }
 used_underscore_items = { level = "allow", priority = 1 }
 wildcard_enum_match_arm = { level = "allow", priority = 1 }
+needless_for_each = { level = "allow", priority = 1 }
 # style-lints:
 doc_lazy_continuation = { level = "allow", priority = 1 }
 doc_overindented_list_items = { level = "allow", priority = 1 }
diff --git a/src/bit_manipulation/binary_count_trailing_zeros.rs b/src/bit_manipulation/binary_count_trailing_zeros.rs
index 9950375ddf9..5e6bd33ff3d 100644
--- a/src/bit_manipulation/binary_count_trailing_zeros.rs
+++ b/src/bit_manipulation/binary_count_trailing_zeros.rs
@@ -50,7 +50,7 @@ pub fn binary_count_trailing_zeros_bitwise(num: u64) -> u32 {
     }
 
     let rightmost_set_bit = num & (num.wrapping_neg());
-    63 - rightmost_set_bit.leading_zeros()
+    rightmost_set_bit.ilog2()
 }
 
 #[cfg(test)]
diff --git a/src/math/prime_check.rs b/src/math/prime_check.rs
index f38366c35fc..ad722afbb35 100644
--- a/src/math/prime_check.rs
+++ b/src/math/prime_check.rs
@@ -1,5 +1,5 @@
 pub fn prime_check(num: usize) -> bool {
-    if (num > 1) & (num < 4) {
+    if (num > 1) && (num < 4) {
         return true;
     } else if (num < 2) || (num.is_multiple_of(2)) {
         return false;