public static bool IsPrime(long Number)
{
IList <long> basicPrimeNumbers = new List <long>()
{
2, 3, 5, 7
};
if (basicPrimeNumbers.Contains(Number))
{
return(true);
}
return(ExtendedEnumerableRange.Int64(2, (long)Math.Sqrt(Number))
.All(n => Number % n != 0));
}
public static long SumSquared(long N)
{
return(ExtendedEnumerableRange.Int64(1, N).Sum(n => n * n));
}
public static long Sum(long N)
{
return(ExtendedEnumerableRange.Int64(1, N).Sum());
}
public static IEnumerable <long> Int64(long from, long to)
{
return(ExtendedEnumerableRange.Int64(from, to, 1L));
}