Just another update

Task/Lucas-Lehmer-test/Visual-Basic-.NET/lucas-lehmer-test.visual

@@ -0,0 +1,23 @@
+Public Class LucasLehmer
+    Private Sub btnGo_Click(sender As Object, e As EventArgs) Handles btnGo.Click
+        Const iexpmax = 31
+        Dim s, n As Long
+        Dim i, iexp As Integer
+        n = 1
+        txtOut.Text = ""
+        For iexp = 2 To iexpmax
+            If iexp = 2 Then
+                s = 0
+            Else
+                s = 4
+            End If
+            n = (n + 1) * 2 - 1
+            For i = 1 To iexp - 2
+                s = (s * s - 2) Mod n
+            Next i
+            If s = 0 Then
+                txtOut.Text = txtOut.Text & "M" & iexp & " "
+            End If
+        Next iexp
+    End Sub
+End Class