BenchmarkDotNet v0.13.12, Windows 11 (10.0.26100.3194)
13th Gen Intel Core i5-13500, 1 CPU, 20 logical and 14 physical cores
.NET SDK 10.0.100-preview.3.25125.5
  [Host]     : .NET 10.0.0 (10.0.25.12411), X64 RyuJIT AVX2
  Job-MGDTRH : .NET 10.0.0 (42.42.42.42424), X64 RyuJIT AVX2
  Job-TRYYFZ : .NET 10.0.0 (42.42.42.42424), X64 RyuJIT AVX2
  Job-BFYRFS : .NET 10.0.0 (42.42.42.42424), X64 RyuJIT AVX2

<details>

<summary>benchmark code</summary>

```cs
using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Configs;
using System.Numerics;

[MemoryDiagnoser(false)]
[HideColumns("Job", "Error", "StdDev", "Median", "RatioSD")]
public class ShiftTest
{
    const int shiftSize = (1 << 23) + 13;
    BigInteger positive, negative;

    [GlobalSetup]
    public void Setup()
    {
        var bytes = new byte[1 << 25];
        new Random(227).NextBytes(bytes);
        positive = new BigInteger(bytes, isUnsigned: true);
        negative = -positive;
    }

    [Benchmark] public BigInteger PositiveLeftShift() => positive << shiftSize;
    [Benchmark] public BigInteger NegativeLeftShift() => negative << shiftSize;

    [Benchmark] public BigInteger PositiveRightShift() => positive >> shiftSize;
    [Benchmark] public BigInteger NegativeRightShift() => negative >> shiftSize;

    [Benchmark] public BigInteger PositiveUnsignedRightShift() => positive >>> shiftSize;
    [Benchmark] public BigInteger NegativeUnsignedRightShift() => negative >>> shiftSize;

    [Benchmark] public BigInteger PositiveRotateLeft() => BigInteger.RotateLeft(positive, shiftSize);
    [Benchmark] public BigInteger NegativeRotateLeft() => BigInteger.RotateLeft(negative, shiftSize);

    [Benchmark] public BigInteger PositiveRotateRight() => BigInteger.RotateRight(positive, shiftSize);
    [Benchmark] public BigInteger NegativeRotateRight() => BigInteger.RotateRight(negative, shiftSize);
}