diff --git a/src/BigInteger.php b/src/BigInteger.php
index ec6989f..d341da4 100644
--- a/src/BigInteger.php
+++ b/src/BigInteger.php
@@ -169,7 +169,7 @@ public static function fromArbitraryBase(string $number, string $alphabet) : Big
     }
 
     /**
-     * Translates a string containing the binary representation of a BigInteger into a BigInteger.
+     * Translates a string of bytes containing the binary representation of a BigInteger into a BigInteger.
      *
      * The input string is assumed to be in big-endian byte-order: the most significant byte is in the zeroth element.
      *
@@ -177,10 +177,9 @@ public static function fromArbitraryBase(string $number, string $alphabet) : Big
      * interpreted as a sign bit. If `$signed` is false, the input is interpreted as an unsigned number, and the
      * resulting BigInteger will always be positive or zero.
      *
-     * This method can be used to retrieve a number exported by `toBinaryString()`, as long as the `$signed` flags
-     * match.
+     * This method can be used to retrieve a number exported by `toBytes()`, as long as the `$signed` flags match.
      *
-     * @param string $value  The binary string value.
+     * @param string $value  The byte string.
      * @param bool   $signed Whether to interpret as a signed number in two's-complement representation with a leading
      *                       sign bit.
      *
@@ -188,10 +187,10 @@ public static function fromArbitraryBase(string $number, string $alphabet) : Big
      *
      * @throws NumberFormatException If the string is empty.
      */
-    public static function fromBinaryString(string $value, bool $signed = true) : BigInteger
+    public static function fromBytes(string $value, bool $signed = true) : BigInteger
     {
         if ($value === '') {
-            throw new NumberFormatException('The binary string must not be empty.');
+            throw new NumberFormatException('The byte string must not be empty.');
         }
 
         $twosComplement = false;
@@ -249,7 +248,7 @@ public static function randomBits(int $numBits, ?callable $randomBytesGenerator
         $randomBytes    = $randomBytesGenerator($byteLength);
         $randomBytes[0] = $randomBytes[0] & $bitmask;
 
-        return self::fromBinaryString($randomBytes, false);
+        return self::fromBytes($randomBytes, false);
     }
 
     /**
@@ -1044,9 +1043,9 @@ public function toArbitraryBase(string $alphabet) : string
     }
 
     /**
-     * Returns a string containing the binary representation of this BigInteger.
+     * Returns a string of bytes containing the binary representation of this BigInteger.
      *
-     * The binary string is in big-endian byte-order: the most significant byte is in the zeroth element.
+     * The string is in big-endian byte-order: the most significant byte is in the zeroth element.
      *
      * If `$signed` is true, the output will be in two's-complement representation, and a sign bit will be prepended to
      * the output. If `$signed` is false, no sign bit will be prepended, and this method will throw an exception if the
@@ -1055,8 +1054,7 @@ public function toArbitraryBase(string $alphabet) : string
      * The string will contain the minimum number of bytes required to represent this BigInteger, including a sign bit
      * if `$signed` is true.
      *
-     * This representation is compatible with the `fromBinaryString()` factory method, as long as the `$signed` flags
-     * match.
+     * This representation is compatible with the `fromBytes()` factory method, as long as the `$signed` flags match.
      *
      * @param bool $signed Whether to output a signed number in two's-complement representation with a leading sign bit.
      *
@@ -1064,10 +1062,10 @@ public function toArbitraryBase(string $alphabet) : string
      *
      * @throws NegativeNumberException If $signed is false, and the number is negative.
      */
-    public function toBinaryString(bool $signed = true) : string
+    public function toBytes(bool $signed = true) : string
     {
         if (! $signed && $this->isNegative()) {
-            throw new NegativeNumberException('Cannot convert a negative number to a binary string when $signed is false.');
+            throw new NegativeNumberException('Cannot convert a negative number to a byte string when $signed is false.');
         }
 
         $pad = function(string $hex) : string {
diff --git a/tests/BigIntegerTest.php b/tests/BigIntegerTest.php
index 8686cb4..139b12c 100644
--- a/tests/BigIntegerTest.php
+++ b/tests/BigIntegerTest.php
@@ -3275,41 +3275,41 @@ public function testToArbitraryBaseOnNegativeNumber() : void
     }
 
     /**
-     * @dataProvider providerFromBinaryString
+     * @dataProvider providerFromBytes
      */
-    public function testFromBinaryString(string $binaryStringHex, bool $signed, string $expectedNumber) : void
+    public function testFromBytes(string $byteStringHex, bool $signed, string $expectedNumber) : void
     {
-        $number = BigInteger::fromBinaryString(hex2bin($binaryStringHex), $signed);
+        $number = BigInteger::fromBytes(hex2bin($byteStringHex), $signed);
         self::assertSame($expectedNumber, (string) $number);
     }
 
-    public function providerFromBinaryString() : Generator
+    public function providerFromBytes() : Generator
     {
-        foreach ($this->providerToBinaryString() as [$expectedNumber, $signed, $binaryStringHex]) {
-            yield [$binaryStringHex, $signed, $expectedNumber];
+        foreach ($this->providerToBytes() as [$expectedNumber, $signed, $byteStringHex]) {
+            yield [$byteStringHex, $signed, $expectedNumber];
 
             // test with extra leading bits: these should return the same number
             $prefix = ($expectedNumber[0] === '-') ? 'FF' : '00';
-            yield [$prefix . $binaryStringHex, $signed, $expectedNumber];
+            yield [$prefix . $byteStringHex, $signed, $expectedNumber];
         }
     }
 
-    public function testFromBinaryStringWithEmptyString() : void
+    public function testFromBytesWithEmptyString() : void
     {
         $this->expectException(NumberFormatException::class);
-        BigInteger::fromBinaryString('');
+        BigInteger::fromBytes('');
     }
 
     /**
-     * @dataProvider providerToBinaryString
+     * @dataProvider providerToBytes
      */
-    public function testToBinaryString(string $number, bool $signed, string $expectedBinaryStringHex) : void
+    public function testToBytes(string $number, bool $signed, string $expectedByteStringHex) : void
     {
-        $binaryString = BigInteger::of($number)->toBinaryString($signed);
-        self::assertSame($expectedBinaryStringHex, strtoupper(bin2hex($binaryString)));
+        $byteString = BigInteger::of($number)->toBytes($signed);
+        self::assertSame($expectedByteStringHex, strtoupper(bin2hex($byteString)));
     }
 
-    public function providerToBinaryString() : array
+    public function providerToBytes() : array
     {
         return [
             ['-32769', true, 'FF7FFF'],
@@ -3461,11 +3461,11 @@ public function providerToBinaryString() : array
         ];
     }
 
-    public function testToBinaryStringNotSignedWithNegativeNumber() : void
+    public function testToBytesNotSignedWithNegativeNumber() : void
     {
         $number = BigInteger::of(-1);
         $this->expectException(NegativeNumberException::class);
-        $number->toBinaryString(false);
+        $number->toBytes(false);
     }
 
     /**