RosettaCodeData/Task/Lucas-Lehmer-test/Visual-Basic-.NET/lucas-lehmer-test.visual
2015-02-20 00:35:01 -05:00

23 lines
639 B
Text

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