Textbox Change Reacts Too Quickly?

When I type an 11 into my textbox (in my userform), I believe that the moment I type the first 1, the "event" kicks in. Is there anyway that I can have the change even "wait" until I am finished typing in all the digits of my number?

Code:
Private Sub TextBox1_Change()
Dim prime As Integer, divisor As Integer, currentcol As Integer
Dim faccount As Integer, currentresidue As Long, currentfactor As Long
Dim i As Integer, j As Integer
prime = TextBox1.Value
TextBox2.Value = prime - 1
'Write divisors across and phi of the divisors across at the bottom
Spreadsheet1.Range("c2").Value = 1

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