private bool IsQuadrupletPrime(PrimesBigInteger value, ref PrimesBigInteger first)
{
PrimesBigInteger twin = null;
if (!value.IsTwinPrime(ref twin))
{
return(false);
}
PrimesBigInteger twin1 = PrimesBigInteger.Min(value, twin);
if ((twin1 + 6).IsTwinPrime(ref twin))
{
first = twin1;
}
else if (twin1 > 6 && (twin1 - 6).IsTwinPrime(ref twin))
{
first = twin1 - 6;
}
else
{
return(false);
}
return(true);
}
private void SetTwinPrimes(PrimesBigInteger value)
{
PrimesBigInteger twin1 = value.Subtract(PrimesBigInteger.One);
PrimesBigInteger twin2 = value.Add(PrimesBigInteger.One);
PrimesBigInteger tmp = null;
if (twin1.IsPrime(20) && twin2.IsPrime(20))
{
lblTwinPrimes.Text = string.Format(Distribution.numberline_insidetwinprime, value, twin1, twin2);
lblTwinPrimes.Visibility = Visibility.Visible;
}
else if (value.IsTwinPrime(ref tmp))
{
twin1 = PrimesBigInteger.Min(value, tmp);
twin2 = PrimesBigInteger.Max(value, tmp);
if (m_ButtonsDict.ContainsKey(twin1))
{
MarkNumber(m_ButtonsDict[twin1]);
}
if (m_ButtonsDict.ContainsKey(twin2))
{
MarkNumber(m_ButtonsDict[twin2]);
}
lblTwinPrimes.Text = string.Format(Distribution.numberline_istwinprime, twin1, twin2);
lblTwinPrimes.Visibility = Visibility.Visible;
}
PrimesBigInteger a = null;
PrimesBigInteger b = null;
string text = "";
twin1.PriorTwinPrime(ref a, ref b);
if (a.CompareTo(twin1) < 0)
{
text = string.Format(Distribution.numberline_priortwinprime, a, b) + " ";
}
twin1.Add(PrimesBigInteger.One).NextTwinPrime(ref a, ref b);
text += string.Format(Distribution.numberline_nexttwinprime, a, b);
lblTwinPrimes2.Text = text;
}