diff --git a/Makefile b/Makefile
index 765f9c0..2ea49ce 100644
--- a/Makefile
+++ b/Makefile
@@ -3,4 +3,4 @@ default:
 	./autoTest.pl
 
 clean: 
-	rm -f *.txt primesc primescpp primesaltc primes.class primespas primes*.exe primes.o primesobjc primes.ali primesada primesfor primese primes.h primes1.c primes1.o primes.id primes.make primescbl link.res ppas.sh primes.beam primesocaml primesasm primes.cmi primes.cmx luac.out primeshs primes_clisp.fas primes.lib Main.hi primes_clisp.lib primes_clisp.o primes.hi primescsieve gst.im primesalt2c primesalt3c primesgo
+	rm -f *.txt primesc primescpp primesaltc primes.class primespas primes*.exe primes.o primesobjc primes.ali primesada primesfor primese primes.h primes1.c primes1.o primes.id primes.make primescbl link.res ppas.sh primes.beam primesocaml primesasm primes.cmi primes.cmx luac.out primeshs primes_clisp.fas primes.lib Main.hi primes_clisp.lib primes_clisp.o primes.hi primescsieve gst.im primesalt2c primesalt3c primesgo primesrs
diff --git a/autoTest.pl b/autoTest.pl
index 15dadc2..5427ad7 100755
--- a/autoTest.pl
+++ b/autoTest.pl
@@ -15,7 +15,7 @@ $debug=0;
 @langs = ("c",
 #	Uncomment for alternat C algorithms      	
 #	"c2", "ca", "ca2", "ca3", 
-	"objc", "cpp",  "asm", "for", "pas", "go", "ada", "hs", "e", "cbl", "oml", "java", "scala", "cs", "vb", "erl", "awk", "pl", "php", "py", "tcl", "rb1.8", "rb1.9", "cl", "scm", "st", "sml", "4th", "pro", "m3", "pike", "lua", "rexx", "r", "fe", "5c", "m4", "sh");
+	"objc", "cpp",  "asm", "for", "pas", "go", "rs", "ada", "hs", "e", "cbl", "oml", "java", "scala", "cs", "vb", "erl", "awk", "pl", "php", "py", "tcl", "rb", "cl", "scm", "st", "sml", "4th", "pro", "m3", "pike", "lua", "rexx", "r", "fe", "5c", "m4", "sh");
 
 $llen = $#langs+1;
 
@@ -123,6 +123,12 @@ $data{'go'}{'compiler0'} = 'go';
 $data{'go'}{'cflags0'} = 'build -o primesgo ';
 $data{'go'}{'prog'} = 'primesgo';
 
+$data{'rs'}{'name'} = "Rust";
+$data{'rs'}{'src'} = "primes.rs";
+$data{'rs'}{'compiler0'} = 'rustc';
+$data{'rs'}{'cflags0'} = ' -o primesrs ';
+$data{'rs'}{'prog'} = 'primesrs';
+
 $data{'sml'}{'name'} = "SML";
 $data{'sml'}{'src'} = "primes.sml";
 #$data{'sml'}{'iflagspre0'} = "echo primes $max | ";
@@ -296,13 +302,13 @@ $data{'fe'}{'prog'} = "primes.fe";
 $data{'fe'}{'interp0'} = "ferite";
 $data{'fe'}{'pre0'}  = "echo $max | ";
 
-$data{'rb1.8'}{'name'} = "Ruby 1.8";
-$data{'rb1.8'}{'prog'} = "primes.rb";
-$data{'rb1.8'}{'interp0'} = "ruby1.8";
+#$data{'rb1.8'}{'name'} = "Ruby 1.8";
+#$data{'rb1.8'}{'prog'} = "primes.rb";
+#$data{'rb1.8'}{'interp0'} = "ruby1.8";
  
-$data{'rb1.9'}{'name'} = "Ruby 1.9.1";
-$data{'rb1.9'}{'prog'} = "primes.rb";
-$data{'rb1.9'}{'interp0'} = "ruby1.9.1";
+$data{'rb'}{'name'} = "Ruby";
+$data{'rb'}{'prog'} = "primes.rb";
+$data{'rb'}{'interp0'} = "ruby";
 
 $data{'java'}{'name'} = "Java";
 $data{'java'}{'src'} = "primes.java";
diff --git a/primes.go b/primes.go
index e250fce..17f80a2 100644
--- a/primes.go
+++ b/primes.go
@@ -2,14 +2,14 @@ package main
 
 // Go version of a prime number finder
 
-import(
+import (
 	"fmt"
+	"math"
 	"os"
 	"strconv"
-	"math"
 )
 
-// In stead of in place printing of each prime, it seems 
+// In stead of in place printing of each prime, it seems
 // fmt.Println is costly, and causes the program to take
 // 7x more time, so we gain speed at the expense of RAM
 // by storing them all in a slice and printing once
@@ -18,19 +18,20 @@ func main() {
 		fmt.Println("Usage: go run primes.go [MAX]")
 		return
 	}
-	primes := make([]int, 0)
-	max,_ := strconv.Atoi(os.Args[1])
-	for i:= 3; i < max; i+=2 {
-		is_prime := true
-		for j := 3; j <= int(math.Ceil(math.Sqrt(float64(i)))); j+=2 {
-			if i % j == 0 {
-				is_prime = false
+	//primes := make([]int, 0)
+	max, _ := strconv.Atoi(os.Args[1])
+	for i := 3; i < max; i += 2 {
+		isPrime := true
+		for j := 3; j <= int(math.Ceil(math.Sqrt(float64(i)))); j += 2 {
+			if i%j == 0 {
+				isPrime = false
 				break
 			}
 		}
-		if is_prime {
-			primes = append(primes, i)
+		if isPrime {
+			//primes = append(primes, i)
+			fmt.Println(i)
 		}
 	}
-	fmt.Println(primes)
+	//fmt.Println(primes)
 }
diff --git a/primes.go.array b/primes.go.array
new file mode 100644
index 0000000..bac776b
--- /dev/null
+++ b/primes.go.array
@@ -0,0 +1,36 @@
+package main
+
+// Go version of a prime number finder
+
+import (
+	"fmt"
+	"math"
+	"os"
+	"strconv"
+)
+
+// In stead of in place printing of each prime, it seems
+// fmt.Println is costly, and causes the program to take
+// 7x more time, so we gain speed at the expense of RAM
+// by storing them all in a slice and printing once
+func main() {
+	if len(os.Args) < 2 {
+		fmt.Println("Usage: go run primes.go [MAX]")
+		return
+	}
+	primes := make([]int, 0)
+	max, _ := strconv.Atoi(os.Args[1])
+	for i := 3; i < max; i += 2 {
+		isPrime := true
+		for j := 3; j <= int(math.Ceil(math.Sqrt(float64(i)))); j += 2 {
+			if i%j == 0 {
+				isPrime = false
+				break
+			}
+		}
+		if isPrime {
+			primes = append(primes, i)			
+		}
+	}
+	fmt.Println(primes)
+}
diff --git a/primes.rs b/primes.rs
new file mode 100644
index 0000000..a359e3e
--- /dev/null
+++ b/primes.rs
@@ -0,0 +1,28 @@
+use std::env;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+    if args.len() != 2 {
+        println!("Usage: ./primes $MAX");
+        return;
+    }
+    let max: u64 = args[1].parse().expect("MAX must be an integer value");
+    let mut i: u64 = 3;
+    
+    while i <= max {        
+        let loop_max: u64 = (i as f64).sqrt() as u64;
+        let mut x: u64 = 2;
+        let mut prime = true;
+        while x <= loop_max {
+            if i % x == 0 {                
+                prime = false;
+                break;
+            }
+            x += 1;
+        }
+        if prime {
+            println!("{}", i)
+        }
+        i += 2;
+    }
+}
\ No newline at end of file