diff --git a/src/IdentityServer/Constants.cs b/src/IdentityServer/Constants.cs
index 74f84a85f..8e0e16cb1 100644
--- a/src/IdentityServer/Constants.cs
+++ b/src/IdentityServer/Constants.cs
@@ -115,7 +115,21 @@ public static class SigningAlgorithms
         //OidcConstants.PromptModes.Create, 
     };
 
-    public const string SuppressedPrompt = "suppressed_" + OidcConstants.AuthorizeRequest.Prompt;
+    /// <summary>
+    /// The name of the parameter passed to the authorize callback to indicate
+    /// prompt modes that have already been used. This constant is deprecated in
+    /// favor of <see cref="ProcessedPrompt"/>.
+    /// </summary>
+    [Obsolete("Use the ProcessedPrompt constant instead.")]
+    public const string SuppressedPrompt = ProcessedPrompt;
+    
+    /// <summary>
+    /// The name of the parameter passed to the authorize callback to indicate
+    /// prompt modes that have already been used. This constant replaces the
+    /// deprecated <see cref="SuppressedPrompt"/>, while keeping the underlying
+    /// value unchanged.
+    /// </summary>
+    public const string ProcessedPrompt = "suppressed_" + OidcConstants.AuthorizeRequest.Prompt;
 
     public static class KnownAcrValues
     {
diff --git a/src/IdentityServer/Extensions/ValidatedAuthorizeRequestExtensions.cs b/src/IdentityServer/Extensions/ValidatedAuthorizeRequestExtensions.cs
index 2bcafcabd..8b416480f 100644
--- a/src/IdentityServer/Extensions/ValidatedAuthorizeRequestExtensions.cs
+++ b/src/IdentityServer/Extensions/ValidatedAuthorizeRequestExtensions.cs
@@ -41,7 +41,7 @@ public static void RemovePrompt(this ValidatedAuthorizeRequest request)
             suppress.Append(OidcConstants.PromptModes.Create);
         }
 
-        request.Raw.Add(Constants.SuppressedPrompt, suppress.ToString());
+        request.Raw.Add(Constants.ProcessedPrompt, suppress.ToString());
         request.PromptModes = request.PromptModes.Except(new[] { 
             OidcConstants.PromptModes.Login, 
             OidcConstants.PromptModes.SelectAccount,
diff --git a/src/IdentityServer/Validation/Default/AuthorizeRequestValidator.cs b/src/IdentityServer/Validation/Default/AuthorizeRequestValidator.cs
index 98775f20d..8fc887e3d 100644
--- a/src/IdentityServer/Validation/Default/AuthorizeRequestValidator.cs
+++ b/src/IdentityServer/Validation/Default/AuthorizeRequestValidator.cs
@@ -610,15 +610,15 @@ private async Task<AuthorizeRequestValidationResult> ValidateOptionalParametersA
             }
         }
 
-        var suppressed_prompt = request.Raw.Get(Constants.SuppressedPrompt);
-        if (suppressed_prompt.IsPresent())
+        var processed_prompt = request.Raw.Get(Constants.ProcessedPrompt);
+        if (processed_prompt.IsPresent())
         {
-            var prompts = suppressed_prompt.Split(' ', StringSplitOptions.RemoveEmptyEntries);
+            var prompts = processed_prompt.Split(' ', StringSplitOptions.RemoveEmptyEntries);
             if (prompts.All(p => _options.UserInteraction.PromptValuesSupported?.Contains(p) == true))
             {
                 if (prompts.Contains(OidcConstants.PromptModes.None) && prompts.Length > 1)
                 {
-                    LogError("suppressed_prompt contains 'none' and other values. 'none' should be used by itself.", request);
+                    LogError("processed_prompt contains 'none' and other values. 'none' should be used by itself.", request);
                     return Invalid(request, description: "Invalid prompt");
                 }
                 if (prompts.Contains(OidcConstants.PromptModes.Create) && prompts.Length > 1)
@@ -627,16 +627,16 @@ private async Task<AuthorizeRequestValidationResult> ValidateOptionalParametersA
                     return Invalid(request, description: "Invalid prompt");
                 }
 
-                request.SuppressedPromptModes = prompts;
+                request.ProcessedPromptModes = prompts;
             }
             else
             {
-                LogError("Unsupported prompt mode.", request);
+                LogError("Unsupported processed_prompt mode.", request);
                 return Invalid(request, description: "Invalid prompt");
             }
         }
 
-        request.PromptModes = request.OriginalPromptModes.Except(request.SuppressedPromptModes).ToArray();
+        request.PromptModes = request.OriginalPromptModes.Except(request.ProcessedPromptModes).ToArray();
 
         //////////////////////////////////////////////////////////
         // check ui locales
diff --git a/src/IdentityServer/Validation/Models/ValidatedAuthorizeRequest.cs b/src/IdentityServer/Validation/Models/ValidatedAuthorizeRequest.cs
index 3b2a10523..7209a468c 100644
--- a/src/IdentityServer/Validation/Models/ValidatedAuthorizeRequest.cs
+++ b/src/IdentityServer/Validation/Models/ValidatedAuthorizeRequest.cs
@@ -137,26 +137,66 @@ public class ValidatedAuthorizeRequest : ValidatedRequest
     /// <summary>
     /// Gets or sets the collection of prompt modes.
     /// </summary>
+    /// <remarks>
+    /// The <see cref="PromptModes"/> change as they are used. For example, if
+    /// the prompt mode is login (to force the login UI to be displayed), the
+    /// collection will initially contain login, but when the login page is
+    /// displayed, the login prompt will be removed from the collection of
+    /// prompt modes so that the login page will only be displayed once.
+    /// <para>
+    /// See also: <see cref="ProcessedPromptModes"/> and <see
+    /// cref="OriginalPromptModes"/>.
+    /// </para>
+    /// </remarks>
     /// <value>
-    /// The collection of prompt modes.
+    /// The collection of prompt modes, which changes as the request is
+    /// processed and various prompts are displayed.
     /// </value>
     public IEnumerable<string> PromptModes { get; set; } = Enumerable.Empty<string>();
 
     /// <summary>
     /// Gets or sets the collection of original prompt modes.
     /// </summary>
+    /// <remarks>
+    /// The <see cref="PromptModes"/> change as they are used. For example, if
+    /// the prompt mode is login (to force the login UI to be displayed), the
+    /// collection will initially contain login, but when the login page is
+    /// displayed, the login prompt will be removed from the collection of
+    /// prompt modes so that the login page will only be displayed once.
+    /// <para>
+    /// See also:
+    /// <list type="bullet">
+    /// <item><seealso cref="ProcessedPromptModes"/></item>
+    /// <item><seealso cref="PromptModes"/></item>
+    /// </list>
+    /// </para>
+    /// </remarks>
     /// <value>
     /// The collection of original prompt modes.
     /// </value>
-    internal IEnumerable<string> OriginalPromptModes { get; set; } = Enumerable.Empty<string>();
+    public IEnumerable<string> OriginalPromptModes { get; set; } = Enumerable.Empty<string>();
 
     /// <summary>
-    /// Gets or sets the collection of suppressed prompt modes.
+    /// Gets or sets the collection of previously processed prompt modes.
     /// </summary>
+    /// <remarks>
+    /// The <see cref="PromptModes"/> change as they are used. For example, if
+    /// the prompt mode is login (to force the login UI to be displayed), the
+    /// collection will initially contain login, but when the login page is
+    /// displayed, the login prompt will be removed from the collection of
+    /// prompt modes so that the login page will only be displayed once.
+    /// </remarks>
+    /// <para>
+    /// See also:
+    /// <list type="bullet">
+    /// <item><seealso cref="PromptModes"/></item>
+    /// <item><seealso cref="OriginalPromptModes"/></item>
+    /// </list>
+    /// </para>
     /// <value>
-    /// The collection of suppressed prompt modes.
+    /// The collection of processed prompt modes.
     /// </value>
-    internal IEnumerable<string> SuppressedPromptModes { get; set; } = Enumerable.Empty<string>();
+    public IEnumerable<string> ProcessedPromptModes { get; set; } = Enumerable.Empty<string>();
 
     /// <summary>
     /// Gets or sets the maximum age.
diff --git a/test/IdentityServer.UnitTests/ResponseHandling/AuthorizeInteractionResponseGenerator/AuthorizeInteractionResponseGeneratorTests_Login.cs b/test/IdentityServer.UnitTests/ResponseHandling/AuthorizeInteractionResponseGenerator/AuthorizeInteractionResponseGeneratorTests_Login.cs
index 576c75b71..a2fde2428 100644
--- a/test/IdentityServer.UnitTests/ResponseHandling/AuthorizeInteractionResponseGenerator/AuthorizeInteractionResponseGeneratorTests_Login.cs
+++ b/test/IdentityServer.UnitTests/ResponseHandling/AuthorizeInteractionResponseGenerator/AuthorizeInteractionResponseGeneratorTests_Login.cs
@@ -269,6 +269,6 @@ public async Task prompt_for_signin_should_suppress_prompt_from_raw_url()
 
         var result = await _subject.ProcessLoginAsync(request);
 
-        request.Raw.AllKeys.Should().Contain(Constants.SuppressedPrompt);
+        request.Raw.AllKeys.Should().Contain(Constants.ProcessedPrompt);
     }
 }
\ No newline at end of file
diff --git a/test/IdentityServer.UnitTests/Validation/AuthorizeRequest Validation/Authorize_ProtocolValidation_Valid.cs b/test/IdentityServer.UnitTests/Validation/AuthorizeRequest Validation/Authorize_ProtocolValidation_Valid.cs
index 055825ef4..70c05babf 100644
--- a/test/IdentityServer.UnitTests/Validation/AuthorizeRequest Validation/Authorize_ProtocolValidation_Valid.cs	
+++ b/test/IdentityServer.UnitTests/Validation/AuthorizeRequest Validation/Authorize_ProtocolValidation_Valid.cs	
@@ -224,7 +224,7 @@ public async Task multiple_prompt_values_should_be_accepted()
 
     [Fact]
     [Trait("Category", Category)]
-    public async Task suppressed_prompt_values_should_overwrite_original_values()
+    public async Task processed_prompt_values_should_overwrite_original_values()
     {
         var validator = Factory.CreateAuthorizeRequestValidator();
             
@@ -242,19 +242,19 @@ public async Task suppressed_prompt_values_should_overwrite_original_values()
         }
         {
             parameters[OidcConstants.AuthorizeRequest.Prompt] = "consent login";
-            parameters[Constants.SuppressedPrompt] = "login";
+            parameters[Constants.ProcessedPrompt] = "login";
             var result = await validator.ValidateAsync(parameters);
             result.ValidatedRequest.PromptModes.Should().BeEquivalentTo(new[] { OidcConstants.PromptModes.Consent });
             result.ValidatedRequest.OriginalPromptModes.Should().BeEquivalentTo(new[] { OidcConstants.PromptModes.Consent, OidcConstants.PromptModes.Login });
-            result.ValidatedRequest.SuppressedPromptModes.Should().BeEquivalentTo(new[] { OidcConstants.PromptModes.Login });
+            result.ValidatedRequest.ProcessedPromptModes.Should().BeEquivalentTo(new[] { OidcConstants.PromptModes.Login });
         }
         {
             parameters[OidcConstants.AuthorizeRequest.Prompt] = "consent login";
-            parameters[Constants.SuppressedPrompt] = "login consent";
+            parameters[Constants.ProcessedPrompt] = "login consent";
             var result = await validator.ValidateAsync(parameters);
             result.ValidatedRequest.PromptModes.Should().BeEmpty();
             result.ValidatedRequest.OriginalPromptModes.Should().BeEquivalentTo(new[] { OidcConstants.PromptModes.Consent, OidcConstants.PromptModes.Login });
-            result.ValidatedRequest.SuppressedPromptModes.Should().BeEquivalentTo(new[] { OidcConstants.PromptModes.Consent, OidcConstants.PromptModes.Login });
+            result.ValidatedRequest.ProcessedPromptModes.Should().BeEquivalentTo(new[] { OidcConstants.PromptModes.Consent, OidcConstants.PromptModes.Login });
         }
     }
 }
\ No newline at end of file