diff --git a/src/applications/project/phid/PhabricatorProjectPHIDTypeProject.php b/src/applications/project/phid/PhabricatorProjectPHIDTypeProject.php
--- a/src/applications/project/phid/PhabricatorProjectPHIDTypeProject.php
+++ b/src/applications/project/phid/PhabricatorProjectPHIDTypeProject.php
@@ -52,10 +52,8 @@
   }
 
   public static function getProjectMonogramPatternFragment() {
-    // NOTE: This explicitly does not match strings which contain only
-    // digits, because digit strings like "#123" are used to reference tasks at
-    // Facebook and are somewhat conventional in general.
-    return '[^\s.!,:;{}#]*[^\s\d.!,:;{}#]+[^\s.!,:;{}#]*';
+    // NOTE: See some discussion in ProjectRemarkupRule.
+    return '[^\s,#]+';
   }
 
   public function canLoadNamedObject($name) {
diff --git a/src/applications/project/remarkup/ProjectRemarkupRule.php b/src/applications/project/remarkup/ProjectRemarkupRule.php
--- a/src/applications/project/remarkup/ProjectRemarkupRule.php
+++ b/src/applications/project/remarkup/ProjectRemarkupRule.php
@@ -1,8 +1,5 @@
 <?php
 
-/**
- * @group project
- */
 final class ProjectRemarkupRule
   extends PhabricatorRemarkupRuleObject {
 
@@ -11,8 +8,22 @@
   }
 
   protected function getObjectIDPattern() {
-    return
-      PhabricatorProjectPHIDTypeProject::getProjectMonogramPatternFragment();
+    // NOTE: This explicitly does not match strings which contain only
+    // digits, because digit strings like "#123" are used to reference tasks at
+    // Facebook and are somewhat conventional in general.
+
+    // The latter half of this rule matches monograms with internal periods,
+    // like `#domain.com`, but does not match monograms with terminal periods,
+    // because they're probably just puncutation.
+
+    // Broadly, this will not match every possible project monogram, and we
+    // accept some false negatives -- like `#1` or `#dot.` -- in order to avoid
+    // a bunch of false positives on general use of the `#` character.
+
+    // In other contexts, the PhabricatorProjectPHIDTypeProject pattern is
+    // controlling and these names should parse correctly.
+
+    return '[^\s.!,:;{}#]*[^\s\d!,:;{}#]+(?:[^\s.!,:;{}#][^\s!,:;{}#]*)*';
   }
 
   protected function loadObjects(array $ids) {