diff --git a/reference/gmp/functions/gmp-gcd.xml b/reference/gmp/functions/gmp-gcd.xml
index 198e7c3b74..81328e3fe7 100644
--- a/reference/gmp/functions/gmp-gcd.xml
+++ b/reference/gmp/functions/gmp-gcd.xml
@@ -71,6 +71,13 @@ echo gmp_strval($gcd) . "\n";
   </para>
  </refsect1>
 
+ <refsect1 role="seealso">
+  &reftitle.seealso;
+  <simplelist>
+   <member><function>gmp_lcm</function></member>
+  </simplelist>
+ </refsect1>
+
 </refentry>
 
 <!-- Keep this comment at the end of the file
diff --git a/reference/gmp/functions/gmp-jacobi.xml b/reference/gmp/functions/gmp-jacobi.xml
index 1947710f3a..262d154398 100644
--- a/reference/gmp/functions/gmp-jacobi.xml
+++ b/reference/gmp/functions/gmp-jacobi.xml
@@ -75,6 +75,14 @@ echo gmp_jacobi("2", "3") . "\n";
   </para>
  </refsect1>
 
+ <refsect1 role="seealso">
+  &reftitle.seealso;
+  <simplelist>
+   <member><function>gmp_kronecker</function></member>
+   <member><function>gmp_legendre</function></member>
+  </simplelist>
+ </refsect1>
+
 </refentry>
 
 <!-- Keep this comment at the end of the file
diff --git a/reference/gmp/functions/gmp-kronecker.xml b/reference/gmp/functions/gmp-kronecker.xml
new file mode 100644
index 0000000000..807c1b2f43
--- /dev/null
+++ b/reference/gmp/functions/gmp-kronecker.xml
@@ -0,0 +1,78 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- $Revision$ -->
+
+<refentry xml:id="function.gmp-kronecker" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
+ <refnamediv>
+  <refname>gmp_kronecker</refname>
+  <refpurpose>Kronecker symbol</refpurpose>
+ </refnamediv>
+
+ <refsect1 role="description">
+  &reftitle.description;
+  <methodsynopsis>
+   <type>int</type><methodname>gmp_kronecker</methodname>
+   <methodparam><type>mixed</type><parameter>a</parameter></methodparam>
+   <methodparam><type>mixed</type><parameter>b</parameter></methodparam>
+  </methodsynopsis>
+  <para>
+   This function computes the Kronecker symbol of <parameter>a</parameter> and
+   <parameter>b</parameter>.
+  </para>
+ </refsect1>
+
+ <refsect1 role="parameters">
+  &reftitle.parameters;
+  <variablelist>
+   <varlistentry>
+    <term><parameter>a</parameter></term>
+    <listitem>
+     &gmp.parameter;
+    </listitem>
+   </varlistentry>
+   <varlistentry>
+    <term><parameter>b</parameter></term>
+    <listitem>
+     &gmp.parameter;
+    </listitem>
+   </varlistentry>
+  </variablelist>
+ </refsect1>
+
+ <refsect1 role="returnvalues">
+  &reftitle.returnvalues;
+  <para>
+   Returns the Kronecker symbol of <parameter>a</parameter> and
+   <parameter>b</parameter>
+  </para>
+ </refsect1>
+
+ <refsect1 role="seealso">
+  &reftitle.seealso;
+  <simplelist>
+   <member><function>gmp_jacobi</function></member>
+   <member><function>gmp_legendre</function></member>
+  </simplelist>
+ </refsect1>
+
+</refentry>
+
+<!-- Keep this comment at the end of the file
+Local variables:
+mode: sgml
+sgml-omittag:t
+sgml-shorttag:t
+sgml-minimize-attributes:nil
+sgml-always-quote-attributes:t
+sgml-indent-step:1
+sgml-indent-data:t
+indent-tabs-mode:nil
+sgml-parent-document:nil
+sgml-default-dtd-file:"~/.phpdoc/manual.ced"
+sgml-exposed-tags:nil
+sgml-local-catalogs:nil
+sgml-local-ecat-files:nil
+End:
+vim600: syn=xml fen fdm=syntax fdl=2 si
+vim: et tw=78 syn=sgml
+vi: ts=1 sw=1
+-->
diff --git a/reference/gmp/functions/gmp-lcm.xml b/reference/gmp/functions/gmp-lcm.xml
new file mode 100644
index 0000000000..40e0c74f78
--- /dev/null
+++ b/reference/gmp/functions/gmp-lcm.xml
@@ -0,0 +1,76 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- $Revision$ -->
+
+<refentry xml:id="function.gmp-lcm" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
+ <refnamediv>
+  <refname>gmp_lcm</refname>
+  <refpurpose>Calculate GCD</refpurpose>
+ </refnamediv>
+
+ <refsect1 role="description">
+  &reftitle.description;
+  <methodsynopsis>
+   <type>GMP</type><methodname>gmp_lcm</methodname>
+   <methodparam><type>mixed</type><parameter>a</parameter></methodparam>
+   <methodparam><type>mixed</type><parameter>b</parameter></methodparam>
+  </methodsynopsis>
+  <para>
+   This function computes the least common multiple (lcm) of
+   <parameter>a</parameter> and <parameter>b</parameter>.
+  </para>
+ </refsect1>
+
+ <refsect1 role="parameters">
+  &reftitle.parameters;
+  <variablelist>
+   <varlistentry>
+    <term><parameter>a</parameter></term>
+    <listitem>
+     &gmp.parameter;
+    </listitem>
+   </varlistentry>
+   <varlistentry>
+    <term><parameter>b</parameter></term>
+    <listitem>
+     &gmp.parameter;
+    </listitem>
+   </varlistentry>
+  </variablelist>
+ </refsect1>
+
+ <refsect1 role="returnvalues">
+  &reftitle.returnvalues;
+  <para>
+   &gmp.return;
+  </para>
+ </refsect1>
+
+ <refsect1 role="seealso">
+  &reftitle.seealso;
+  <simplelist>
+   <member><function>gmp_gcd</function></member>
+  </simplelist>
+ </refsect1>
+
+</refentry>
+
+<!-- Keep this comment at the end of the file
+Local variables:
+mode: sgml
+sgml-omittag:t
+sgml-shorttag:t
+sgml-minimize-attributes:nil
+sgml-always-quote-attributes:t
+sgml-indent-step:1
+sgml-indent-data:t
+indent-tabs-mode:nil
+sgml-parent-document:nil
+sgml-default-dtd-file:"~/.phpdoc/manual.ced"
+sgml-exposed-tags:nil
+sgml-local-catalogs:nil
+sgml-local-ecat-files:nil
+End:
+vim600: syn=xml fen fdm=syntax fdl=2 si
+vim: et tw=78 syn=sgml
+vi: ts=1 sw=1
+-->
diff --git a/reference/gmp/functions/gmp-legendre.xml b/reference/gmp/functions/gmp-legendre.xml
index 7a1a88f308..093008d641 100644
--- a/reference/gmp/functions/gmp-legendre.xml
+++ b/reference/gmp/functions/gmp-legendre.xml
@@ -76,6 +76,14 @@ echo gmp_legendre("2", "3") . "\n";
   </para>
  </refsect1>
 
+ <refsect1 role="seealso">
+  &reftitle.seealso;
+  <simplelist>
+   <member><function>gmp_jacobi</function></member>
+   <member><function>gmp_kronecker</function></member>
+  </simplelist>
+ </refsect1>
+
 </refentry>
 
 <!-- Keep this comment at the end of the file
diff --git a/reference/gmp/functions/gmp-perfect-power.xml b/reference/gmp/functions/gmp-perfect-power.xml
new file mode 100644
index 0000000000..92b1e3d6ee
--- /dev/null
+++ b/reference/gmp/functions/gmp-perfect-power.xml
@@ -0,0 +1,68 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- $Revision$ -->
+
+<refentry xml:id="function.gmp-perfect-power" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
+ <refnamediv>
+  <refname>gmp_perfect_power</refname>
+  <refpurpose>Perfect power check</refpurpose>
+ </refnamediv>
+
+ <refsect1 role="description">
+  &reftitle.description;
+  <methodsynopsis>
+   <type>bool</type><methodname>gmp_perfect_power</methodname>
+   <methodparam><type>mixed</type><parameter>a</parameter></methodparam>
+  </methodsynopsis>
+  <para>
+   Checks whether <parameter>a</parameter> is a perfect power.
+  </para>
+ </refsect1>
+
+ <refsect1 role="parameters">
+  &reftitle.parameters;
+  <variablelist>
+   <varlistentry>
+    <term><parameter>a</parameter></term>
+    <listitem>
+     &gmp.parameter;
+    </listitem>
+   </varlistentry>
+  </variablelist>
+ </refsect1>
+
+ <refsect1 role="returnvalues">
+  &reftitle.returnvalues;
+  <para>
+   Returns &true; if <parameter>a</parameter> is a perfect power, &false; otherwise.
+  </para>
+ </refsect1>
+
+ <refsect1 role="seealso">
+  &reftitle.seealso;
+  <simplelist>
+   <member><function>gmp_perfect_square</function></member>
+  </simplelist>
+ </refsect1>
+
+</refentry>
+
+<!-- Keep this comment at the end of the file
+Local variables:
+mode: sgml
+sgml-omittag:t
+sgml-shorttag:t
+sgml-minimize-attributes:nil
+sgml-always-quote-attributes:t
+sgml-indent-step:1
+sgml-indent-data:t
+indent-tabs-mode:nil
+sgml-parent-document:nil
+sgml-default-dtd-file:"~/.phpdoc/manual.ced"
+sgml-exposed-tags:nil
+sgml-local-catalogs:nil
+sgml-local-ecat-files:nil
+End:
+vim600: syn=xml fen fdm=syntax fdl=2 si
+vim: et tw=78 syn=sgml
+vi: ts=1 sw=1
+-->
diff --git a/reference/gmp/functions/gmp-perfect-square.xml b/reference/gmp/functions/gmp-perfect-square.xml
index d979d335a1..e7ae25b916 100644
--- a/reference/gmp/functions/gmp-perfect-square.xml
+++ b/reference/gmp/functions/gmp-perfect-square.xml
@@ -77,6 +77,7 @@ bool(true)
   &reftitle.seealso;
   <para>
    <simplelist>
+    <member><function>gmp_perfect_power</function></member>
     <member><function>gmp_sqrt</function></member>
     <member><function>gmp_sqrtrem</function></member>
    </simplelist>
diff --git a/reference/gmp/versions.xml b/reference/gmp/versions.xml
index fdd59382f4..21b2aa1ce7 100644
--- a/reference/gmp/versions.xml
+++ b/reference/gmp/versions.xml
@@ -27,12 +27,15 @@
  <function name='gmp_invert' from='PHP 4 &gt;= 4.0.4, PHP 5, PHP 7'/>
  <function name='gmp_import' from='PHP 5 &gt;= 5.6.1, PHP 7'/>
  <function name='gmp_jacobi' from='PHP 4 &gt;= 4.0.4, PHP 5, PHP 7'/>
+ <function name='gmp_kronecker' from='PHP 7 &gt;= 7.3.0'/>
+ <function name='gmp_lcm' from='PHP 7 &gt;= 7.3.0'/>
  <function name='gmp_legendre' from='PHP 4 &gt;= 4.0.4, PHP 5, PHP 7'/>
  <function name='gmp_mod' from='PHP 4 &gt;= 4.0.4, PHP 5, PHP 7'/>
  <function name='gmp_mul' from='PHP 4 &gt;= 4.0.4, PHP 5, PHP 7'/>
  <function name='gmp_neg' from='PHP 4 &gt;= 4.0.4, PHP 5, PHP 7'/>
  <function name='gmp_nextprime' from='PHP 5 &gt;= 5.2.0, PHP 7'/>
  <function name='gmp_or' from='PHP 4 &gt;= 4.0.4, PHP 5, PHP 7'/>
+ <function name='gmp_perfect_power' from='PHP 7 &gt;= 7.3.0'/>
  <function name='gmp_perfect_square' from='PHP 4 &gt;= 4.0.4, PHP 5, PHP 7'/>
  <function name='gmp_popcount' from='PHP 4 &gt;= 4.0.4, PHP 5, PHP 7'/>
  <function name='gmp_pow' from='PHP 4 &gt;= 4.0.4, PHP 5, PHP 7'/>