Expand GPU coverage for even perfect candidate tests

PerfectNumbers.Core.Tests/MersenneNumberResidueGpuTesterTests.cs

@@ -25,6 +25,20 @@ public class MersenneNumberResidueGpuTesterTests
         RunCase(tester, 127UL, 1_001UL, expectedPrime: true);
     }
 
+    [Theory]
+    [InlineData(false)]
+    [InlineData(true)]
+    [Trait("Category", "Fast")]
+    public void Scan_recognizes_all_known_small_mersenne_primes(bool useGpuOrder)
+    {
+        var tester = new MersenneNumberResidueGpuTester(useGpuOrder);
+
+        foreach (ulong exponent in MersennePrimeTestData.Exponents)
+        {
+            RunCase(tester, exponent, 1UL, expectedPrime: true);
+        }
+    }
+
     [Theory]
     [InlineData(false)]
     [InlineData(true)]