GPU memory allocations protected with lock to prevent shared memory access issues. GPU usage limited for the best performance.

PerfectNumbers.Core/PerfectNumberConstants.cs

@@ -13,7 +13,7 @@ public static class PerfectNumberConstants
     public const int MaxOddPowersCount = 128;
 	public const int PooledArrayThreshold = 64;
 	public static readonly int RollingAccelerators = 298; //SharedGpuContext.Device.MaxNumThreadsPerGroup;
-	public const int ThreadsByAccelerator = 4096;
+	public const int ThreadsByAccelerator = 1;
     // TODO: Load these limits from the benchmark-driven configuration so CPU and GPU scans stay aligned with the optimal
     // divisor-cycle datasets we generate offline.
     // TODO: Promote these magic numbers into a runtime profile derived from EvenPerfectBitScanner.Benchmarks so we can retune