diff --git a/PerfectNumbers.Core/MersenneNumberTester.cs b/PerfectNumbers.Core/MersenneNumberTester.cs
index 74c5313..93dd5a6 100644
--- a/PerfectNumbers.Core/MersenneNumberTester.cs
+++ b/PerfectNumbers.Core/MersenneNumberTester.cs
@@ -146,6 +146,7 @@ public sealed class MersenneNumberTester(
 
 		if (idx == 0)
 		{
+			PrimeOrderCalculatorAccelerator.Return(gpu);
 			ThreadStaticPools.UInt128Pool.Return(qsBuffer);
 			return;
 		}