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PrimesSequence.cs
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PrimesSequence.cs
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using System.Collections.Generic;
using System.Linq;
using System.Numerics;
namespace Algorithms.Sequences;
/// <summary>
/// <para>
/// Sequence of prime numbers.
/// </para>
/// <para>
/// Wikipedia: https://wikipedia.org/wiki/Prime_number.
/// </para>
/// <para>
/// OEIS: https://oeis.org/A000040.
/// </para>
/// </summary>
public class PrimesSequence : ISequence
{
/// <summary>
/// Gets sequence of prime numbers.
/// </summary>
public IEnumerable<BigInteger> Sequence
{
get
{
yield return 2;
var primes = new List<BigInteger>
{
2,
};
var n = new BigInteger(3);
while (true)
{
if (primes.All(p => n % p != 0))
{
yield return n;
primes.Add(n);
}
n += 2;
}
}
}
}