Data commit

Task/Giuga-numbers/Nim/giuga-numbers.nim

@@ -0,0 +1,29 @@
+import std/math
+
+func isGiuga(m: Natural): bool =
+  var n = m
+  var f = 2
+  var l = int(sqrt(n.toFloat))
+  while true:
+    if n mod f == 0:
+      if (m div f - 1) mod f != 0:
+        return false
+      n = n div f
+      if f > n:
+        return true
+    else:
+      inc f
+      if f > l:
+        return false
+
+var n = 3
+var c = 0
+const Limit = 4
+stdout.write "The first ", Limit, " Giuga numbers are: "
+while true:
+  if n.isGiuga:
+    inc c
+    stdout.write n, " "
+    if c == Limit: break
+  inc n
+echo()