Index: src/Boo.Lang.Parser/boo.g
===================================================================
--- src/Boo.Lang.Parser/boo.g	(revision 1773)
+++ src/Boo.Lang.Parser/boo.g	(working copy)
@@ -2568,17 +2568,17 @@
 
 INT : 
 	("0x"(HEXDIGIT)+)(('l' | 'L') { $setType(LONG); })? |
-	(DIGIT)+
+	(DIGIT (' '!)?)+
 	(
 		('l' | 'L') { $setType(LONG); } |
 		(
-			({BooLexer.IsDigit(LA(2))}? ('.' (DIGIT)+) { $setType(DOUBLE); })?
+			({BooLexer.IsDigit(LA(2))}? ('.' (DIGIT (' ')?)+) { $setType(DOUBLE); })?
 			(("ms" | 's' | 'm' | 'h' | 'd') { $setType(TIMESPAN); })?
 		)
 	)
 	;
 
-DOT : '.' ((DIGIT)+ {$setType(DOUBLE);})?;
+DOT : '.' ((DIGIT (' '!)?)+ {$setType(DOUBLE);})?;
 
 COLON : ':';
 
Index: src/Boo.Lang.Parser/booel.g
===================================================================
--- src/Boo.Lang.Parser/booel.g	(revision 1773)
+++ src/Boo.Lang.Parser/booel.g	(working copy)
@@ -60,17 +60,17 @@
 
 INT : 
 	("0x"(HEXDIGIT)+)(('l' | 'L') { $setType(LONG); })? |
-	(DIGIT)+
+	(DIGIT (' '!)?)+
 	(
 		('l' | 'L') { $setType(LONG); } |
 		(
-			({BooLexer.IsDigit(LA(2))}? ('.' (DIGIT)+) { $setType(DOUBLE); })?
+			({BooLexer.IsDigit(LA(2))}? ('.' (DIGIT (' ')?)+) { $setType(DOUBLE); })?
 			(("ms" | 's' | 'm' | 'h' | 'd') { $setType(TIMESPAN); })?
 		)
 	)
 	;
 
-DOT : '.' ((DIGIT)+ {$setType(DOUBLE);})?;
+DOT : '.' ((DIGIT (' '!)?)+ {$setType(DOUBLE);})?;
 
 COLON : ':';
 
Index: tests/testcases/compilation/grouping0.boo
===================================================================
--- tests/testcases/compilation/grouping0.boo	(revision 0)
+++ tests/testcases/compilation/grouping0.boo	(revision 0)
@@ -0,0 +1,41 @@
+"""
+1000000 System.Int32
+1000 System.Double
+00:16:40 System.TimeSpan
+0.001 System.Double
+1000 System.Int64
+1000 System.Int64
+1000000
+1000
+00:16:40
+0.001
+1000
+1000
+"""
+
+n = 1 000 000
+print n, n.GetType()
+n2 = 1 000 .00  //can't have space after decimal point
+print n2, n2.GetType()
+n3 = 1 000 000 ms //timespans and other literals work
+print n3, n3.GetType()
+n4 = .0 0 1  //only one space allowed btw each number
+print n4, n4.GetType()
+n5 = 1 000 L
+print n5, n5.GetType()
+n6 = 1000L
+print n6, n6.GetType()
+
+s = "${1 000 000}"
+print s
+s2 = "${1 000 .00}"
+print s2
+s3 = "${1 000 000 ms}"
+print s3
+s4 = "${.0 0 1}"
+print s4
+s5 = "${1 000 L}"
+print s5
+s6 = "${1000L}"
+print s6
+