static void Main(string[] args)
{
mpz_t tot = P / 3;
for (mpz_t roota = 1; roota <= P.Sqrt(); roota++)
{
if (roota % 1000 == 0)
{
Console.Write($"\r{roota} : {P.Sqrt()}");
}
for (mpz_t rootc = roota + 1; ; rootc++)
{
mpz_t a = roota.Power(2);
mpz_t c = rootc.Power(2);
mpz_t b = roota.Multiply(rootc);
if (a + b + c > P || c > a + b)
{
break;
}
//if (mpz_t.Gcd(a, c) == 1)
{
Console.WriteLine($"{a},{b},{c} {roota} / {rootc}{(mpz_t.Gcd(a,c) > 1 ? " M" : "")}");
tot += P.Divide(a + b + c);
}
}
Console.WriteLine();
}
Console.WriteLine(tot);
}
private static mpz_t[] MakeFactors(mpz_t n)
{
var allFactors = new List <mpz_t>();
var factors = Primes.Where(p => p <= n.Sqrt()).SelectMany(p =>
{
var pair = n.Divide(p, out mpz_t rem);
var factorsthis = new List <mpz_t>();
if (rem == 0)
{
factorsthis.Add(p);
factorsthis.Add(pair);
factorsthis.AddRange(GetFactors(pair));
}
return(factorsthis.Distinct().ToArray());
}).Distinct().ToArray();
Array.Sort(factors);
return(factors);
}
