From 8e3e99049981938fad7ddac6494d2eb475fe9458 Mon Sep 17 00:00:00 2001
From: mlemanczyk <marek@lemanczyk.eu>
Date: Thu, 23 Oct 2025 16:43:52 +0200
Subject: [PATCH] Throwing exception added in case of invalid modulus to
 validate if the check ever kicks off

---
 PerfectNumbers.Core/ExponentRemainderStepper.cs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/PerfectNumbers.Core/ExponentRemainderStepper.cs b/PerfectNumbers.Core/ExponentRemainderStepper.cs
index dda453c..5cbef65 100644
--- a/PerfectNumbers.Core/ExponentRemainderStepper.cs
+++ b/PerfectNumbers.Core/ExponentRemainderStepper.cs
@@ -69,8 +69,9 @@ internal struct ExponentRemainderStepper
     {
         if (!IsValidModulus)
         {
-            _hasState = false;
-            return false;
+			throw new InvalidOperationException($"Modulus is invalid for exponent {exponent}");
+            // _hasState = false;
+            // return false;
         }
 
         if (!_hasState || exponent <= _previousExponent)