diff --git a/euler3.scm b/euler3.scm
new file mode 100644
index 0000000..208fec1
--- /dev/null
+++ b/euler3.scm
@@ -0,0 +1,16 @@
+(define (factors n)
+   (let loop ((val n) (div 2) (factors '()))
+      (if (= 1 val)
+         factors
+         (if (= 0 (modulo val div)) 
+            (loop (/ val div) div (cons div factors))
+            (loop val (add1 div) factors)
+         )
+      )
+   )
+)
+
+(define (max lst)
+   (foldl (lambda (a b) (if (> a b) a b)) (car lst) (cdr lst)))
+
+(print (max (factors 600851475143)))
\ No newline at end of file