diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..f3d74a9
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+*.pyc
+*~
diff --git a/euler1.py~ b/euler1.py~
deleted file mode 100644
index de30530..0000000
--- a/euler1.py~
+++ /dev/null
@@ -1,25 +0,0 @@
-# If we list all the natural numbers below
-# 10 that are multiples of 3 or 5, we get 
-# 3, 5, 6, 9. The sum of these multiples is 23
-#
-# Find the sum of all the multiples of 3 or 5
-# below 1000
-
-def strat1(x, y, mx):
-	count = 0
-	for i in range(mx):
-		if (i % x == 0) or (i % y == 0):
-			count += i
-	return count
-
-def strat2(x,y,mx):
-	def f(n): return not n % x * n % y
-	return sum(filter(f, range(min(x,y), mx)))
-
-def strat3(x,y,mx):
-	return sum([i for i in range(mx) if not i % x * i % y])
-
-
-print strat1(3,5,1000)
-print strat2(3,5,1000)
-print strat3(3,5,1000)
diff --git a/euler2.py~ b/euler2.py~
deleted file mode 100644
index 6622980..0000000
--- a/euler2.py~
+++ /dev/null
@@ -1,9 +0,0 @@
-def strat1(x):
-	seq = [1,2]
-	while seq[len(seq)-1]+seq[len(seq)-2] <= x:
-		seq.append(seq[len(seq)-1]+seq[len(seq)-2])
-	return sum([i for i in seq if i % 2 == 0])
-
-print strat1(4000000)
-
-
diff --git a/euler3.py b/euler3.py
index b1460e1..8dffd15 100644
--- a/euler3.py
+++ b/euler3.py
@@ -1,21 +1,22 @@
-def factors(x):
-	from math import sqrt
-	from math import ceil
-	fin = []
-	for i in range(2, int(sqrt(x)+1)):
-		if (x % i == 0):
-			fin.append(i)
-			fin.append(x/i)
-	return sorted(fin)
+from math import sqrt
 
+def factors(x):
+    fin = []
+    i = 2
+    while i <= sqrt(x):
+        if (x % i == 0):
+            fin.append(i)
+            while (x % i == 0):
+                x = x / i
+        i += 1
+    if x != 1:
+        fin.append(x)
+    return fin
 
 
 def primes(x):
-	fin = []
-	for i in range(len(factors(x))):
-		if(len(factors(factors(x)[i])) == 0):
-			fin.append(factors(x)[i])
-	return fin
+    return factors(x)[-1]
 
 
+print factors(600851475143)
 print primes(600851475143)
diff --git a/euler3.py~ b/euler3.py~
deleted file mode 100644
index 203ffb6..0000000
--- a/euler3.py~
+++ /dev/null
@@ -1,22 +0,0 @@
-def factors(x):
-	from math import sqrt
-	from math import ceil
-	fin = []
-	for i in range(2, int(sqrt(x)+1)):
-		if (x % i == 0):
-			fin.append(i)
-			fin.append(x/i)
-	return sorted(fin)
-
-
-
-def primes(x):
-	fin = []
-	for i in range(len(factors(x))):
-		if(len(factors(factors(x)[i])) == 0):
-			fin.append(factors(x)[i])
-	return fin
-
-
-print factors(500000)
-print primes(12512512)
diff --git a/euler4.py~ b/euler4.py~
deleted file mode 100644
index 4163250..0000000
--- a/euler4.py~
+++ /dev/null
@@ -1,27 +0,0 @@
-def isPal(x):
-	cs = []	
-	for i in range(len(str(x))):
-		if(str(x)[len(str(x))-i-1] != str(x)[i]):
-			return False
-	else:
-		return True
-
-#print "323: " + str(isPal(323))
-#print "324: " + str(isPal(324))
-#print "32423: " + str(isPal(32423))
-#print "1324231: " + str(isPal(1324231))
-
-def biggestPal():
-	fin = []
-	for i in range(999, 99, -1):
-		for j in range(999, i-50, -1):
-			if isPal(i*j):
-				if (i*j == 906609):
-					print i 
-					print j
-				fin.append(i*j)
-	print sorted(fin)
-
-
-
-print biggestPal()
diff --git a/profile b/profile
new file mode 100755
index 0000000..a8a3f63
--- /dev/null
+++ b/profile
@@ -0,0 +1,12 @@
+#!/bin/bash
+
+if [ "$#" != "1" ]; then
+    echo "Usage: profile N"
+    echo "    Run the python profiler on eulerN.py."
+    exit 1
+fi
+
+FILE=euler${1}.py
+
+echo Profiling $FILE...
+python -m cProfile -s cumulative $FILE