/// <summary>
/// Main Thread
/// </summary>
static void Main()
{
const int MAX_VALUE = 1000000;
Dictionary <Int64, int> Solutions = new Dictionary <long, int>();
PrimeNumber.CalculateTermsUntilValue(MAX_VALUE);
int i = 1;
Int64 primeNumber = PrimeNumber.GetPrimeTerm(i);
while (primeNumber < MAX_VALUE)
{
int index = 1;
while (PrimeNumber.GetPrimeTerm((int)index) < System.Math.Sqrt(primeNumber))
{
Int64 sum = 0;
int count = 0;
int j = index;
while (sum < primeNumber)
{
sum += PrimeNumber.GetPrimeTerm((int)j);
count++;
j++;
}
if (sum == primeNumber)
{
if (Solutions.ContainsKey(primeNumber))
{
if (count > Solutions[primeNumber])
{
Solutions[primeNumber] = count;
}
}
else
{
Solutions.Add(primeNumber, count);
}
}
index++;
}
i++;
primeNumber = PrimeNumber.GetPrimeTerm(i);
}
Console.WriteLine("Solution: {0}", Solutions.Aggregate((l, r) => l.Value > r.Value ? l : r).Key);
}
/// <summary>
/// Main Thread
/// </summary>
static void Main()
{
PrimeNumber.CalculateTermsUntilValue(MAX_NUMBER);
List <Int64> solution = (from p in PrimeNumber.GetListPrimes()
where ((p.ToString().Length == 4) || (p.ToString().Length == 7)) &&
Pandigital.IsPandigital(p)
select p).ToList();
Console.WriteLine("Solution: {0}", solution.Max());
}
/// <summary>
/// Main Thread
/// </summary>
static void Main()
{
const int MAX_NUMBER = 1000000;
PrimeNumber.CalculateTermsUntilValue(MAX_NUMBER);
int result = (from p in PrimeNumber.GetListPrimes()
where PrimeNumber.IsCircularPrime(p)
select p).Count();
Console.WriteLine("Solution: {0}", result);
}
/// <summary>
/// Main Thread
/// </summary>
static void Main()
{
PrimeNumber.CalculateTermsUntilValue(10000);
List <Int64> primes = PrimeNumber.GetListPrimes();
string solution = (from p1 in primes
from p2 in primes
from p3 in primes
where p1 > 1487 && p2 - p1 == 3330 && p3 - p2 == 3330 &&
Permutation.ArePermutations(p1, p2) &&
Permutation.ArePermutations(p2, p3)
select p1.ToString() + p2.ToString() + p3.ToString()).FirstOrDefault();
Console.WriteLine("Solution: {0}", solution);
}
static void Main()
{
const int MAX_NUMBER = 50000000;
PrimeNumber.CalculateTermsUntilValue((int)(Math.Sqrt(MAX_NUMBER) + 1));
HashSet <double> solutions = new HashSet <double>();
List <Int64> primes = PrimeNumber.GetListPrimes();
for (int i = 0; i < primes.Count; i++)
{
double firstPow = Math.Pow(primes[i], 2);
if (firstPow <= MAX_NUMBER)
{
for (int j = 0; j < primes.Count; j++)
{
double secondPow = Math.Pow(primes[j], 3);
if (firstPow + secondPow <= MAX_NUMBER)
{
for (int k = 0; k < primes.Count; k++)
{
double result = firstPow + secondPow + Math.Pow(primes[k], 4);
if (result <= MAX_NUMBER)
{
solutions.Add(result);
}
}
}
}
}
}
Console.WriteLine("Solution: {0}", solutions.Count());
}
/// <summary>
/// Main Thread
/// </summary>
static void Main()
{
PrimeNumber.CalculateTermsUntilValue(MAX_VALUE);
Console.WriteLine("Solution: {0}", PrimeNumber.GetListPrimes().Where(p => (p < MAX_VALUE)).Sum());
}