m = Val(InputBox("輸入壹個整數(100~999)"))
n = Val(InputBox("輸入壹個整數(100~999)"))
If m >= 100 And m <= 999 And n >= 100 And n < 999 And m < n Then
For i = m To n
For j = 2 To i - 1
If i Mod j = 0 Then Exit For
Next
If j = i Then
Print i;
k = k + 1
If k Mod 5 = 0 Then Print
End If
Next
Else
MsgBox "輸入不正確"
End If
End Sub