PrimeOrderCalculatorAccelerator.Rent is now created outside of the loops and re-used for all calculations.

PerfectNumbers.Core.Tests/MersenneNumberTester/MersenneResidueModeTests.cs

@@ -1,4 +1,5 @@
 using FluentAssertions;
+using PerfectNumbers.Core.Gpu.Accelerators;
 using Xunit;
 
 namespace PerfectNumbers.Core.Tests;
@@ -6,27 +7,43 @@ namespace PerfectNumbers.Core.Tests;
 [Trait("Category", "Fast")]
 public class MersenneResidueModeTests
 {
-    [Fact]
-    public void IsMersennePrime_residue_mode_rejects_composite_exponent()
-    {
-        var tester = new MersenneNumberTester(
-            useResidue: true,
-            useIncremental: false,
-            useGpuScan: false,
-            useGpuOrder: false);
-        tester.IsMersennePrime(136_000_002UL).Should().BeFalse();
-    }
+	[Fact]
+	public void IsMersennePrime_residue_mode_rejects_composite_exponent()
+	{
+		var tester = new MersenneNumberTester(
+			useResidue: true,
+			useIncremental: false,
+			useGpuScan: false,
+			useGpuOrder: false);
+		var gpu = PrimeOrderCalculatorAccelerator.Rent(1);
+		try
+		{
+			tester.IsMersennePrime(gpu, 136_000_002UL).Should().BeFalse();
+		}
+		finally
+		{
+			PrimeOrderCalculatorAccelerator.Return(gpu);
+		}
+	}
 
-    [Fact]
-    public void IsMersennePrime_residue_mode_accepts_prime_exponent()
-    {
-        var tester = new MersenneNumberTester(
-            useResidue: true,
-            useIncremental: true,
-            useGpuScan: false,
-            useGpuOrder: false,
-            maxK: 1_000UL);
-        tester.IsMersennePrime(31UL).Should().BeTrue();
-    }
+	[Fact]
+	public void IsMersennePrime_residue_mode_accepts_prime_exponent()
+	{
+		var tester = new MersenneNumberTester(
+			useResidue: true,
+			useIncremental: true,
+			useGpuScan: false,
+			useGpuOrder: false,
+			maxK: 1_000UL);
+		var gpu = PrimeOrderCalculatorAccelerator.Rent(1);
+		try
+		{
+			tester.IsMersennePrime(gpu, 31UL).Should().BeTrue();
+		}
+		finally
+		{
+			PrimeOrderCalculatorAccelerator.Return(gpu);
+		}
+	}
 }