diff --git a/src/currency_core/blockchain_storage.cpp b/src/currency_core/blockchain_storage.cpp
index 4c3a185c..2b68f647 100644
--- a/src/currency_core/blockchain_storage.cpp
+++ b/src/currency_core/blockchain_storage.cpp
@@ -1821,8 +1821,8 @@ bool blockchain_storage::is_reorganize_required(const block_extended_info& main_
     main_cumul_diff.pow_diff = main_pow_diff_end - main_pow_diff_begin;
 
     //TODO: measurement of precise cumulative difficult
-    wide_difficulty_type alt = get_a_to_b_relative_cumulative_difficulty(difficulty_pos_at_split_point, difficulty_pow_at_split_point, alt_cumul_diff, main_cumul_diff);
-    wide_difficulty_type main = get_a_to_b_relative_cumulative_difficulty(difficulty_pos_at_split_point, difficulty_pow_at_split_point, main_cumul_diff, alt_cumul_diff);
+    boost::multiprecision::uint1024_t alt = get_a_to_b_relative_cumulative_difficulty(difficulty_pos_at_split_point, difficulty_pow_at_split_point, alt_cumul_diff, main_cumul_diff);
+    boost::multiprecision::uint1024_t main = get_a_to_b_relative_cumulative_difficulty(difficulty_pos_at_split_point, difficulty_pow_at_split_point, main_cumul_diff, alt_cumul_diff);
     LOG_PRINT_L1("[FORK_CHOICE]: " << ENDL 
       << "difficulty_pow_at_split_point:" << difficulty_pow_at_split_point << ENDL
       << "difficulty_pos_at_split_point:" << difficulty_pos_at_split_point << ENDL
diff --git a/src/currency_core/currency_format_utils.cpp b/src/currency_core/currency_format_utils.cpp
index 27b908c4..d412947e 100644
--- a/src/currency_core/currency_format_utils.cpp
+++ b/src/currency_core/currency_format_utils.cpp
@@ -2702,7 +2702,7 @@ namespace currency
   }
 
 
-  wide_difficulty_type get_a_to_b_relative_cumulative_difficulty(const wide_difficulty_type& difficulty_pos_at_split_point,
+  boost::multiprecision::uint1024_t get_a_to_b_relative_cumulative_difficulty(const wide_difficulty_type& difficulty_pos_at_split_point,
     const wide_difficulty_type& difficulty_pow_at_split_point,
     const difficulties& a_diff,
     const difficulties& b_diff )
@@ -2717,20 +2717,20 @@ namespace currency
     boost::multiprecision::uint1024_t res =
       (basic_sum * a_pow_cumulative_difficulty * a_pos_cumulative_difficulty) / (boost::multiprecision::uint1024_t(b_pow_cumulative_difficulty)*b_pos_cumulative_difficulty);
 
-    if (res > boost::math::tools::max_value<wide_difficulty_type>())
-    {
-      ASSERT_MES_AND_THROW("[INTERNAL ERROR]: Failed to get_a_to_b_relative_cumulative_difficulty, res = " << res << ENDL
-        << ", difficulty_pos_at_split_point: " << difficulty_pos_at_split_point << ENDL
-        << ", difficulty_pow_at_split_point:" << difficulty_pow_at_split_point << ENDL
-        << ", a_pos_cumulative_difficulty:" << a_pos_cumulative_difficulty << ENDL
-        << ", b_pos_cumulative_difficulty:" << b_pos_cumulative_difficulty << ENDL
-        << ", a_pow_cumulative_difficulty:" << a_pow_cumulative_difficulty << ENDL
-        << ", b_pow_cumulative_difficulty:" << b_pow_cumulative_difficulty << ENDL       
-      );
-    }
+//     if (res > boost::math::tools::max_value<wide_difficulty_type>())
+//     {
+//       ASSERT_MES_AND_THROW("[INTERNAL ERROR]: Failed to get_a_to_b_relative_cumulative_difficulty, res = " << res << ENDL
+//         << ", difficulty_pos_at_split_point: " << difficulty_pos_at_split_point << ENDL
+//         << ", difficulty_pow_at_split_point:" << difficulty_pow_at_split_point << ENDL
+//         << ", a_pos_cumulative_difficulty:" << a_pos_cumulative_difficulty << ENDL
+//         << ", b_pos_cumulative_difficulty:" << b_pos_cumulative_difficulty << ENDL
+//         << ", a_pow_cumulative_difficulty:" << a_pow_cumulative_difficulty << ENDL
+//         << ", b_pow_cumulative_difficulty:" << b_pow_cumulative_difficulty << ENDL       
+//       );
+//     }
     TRY_ENTRY();
-    wide_difficulty_type short_res = res.convert_to<wide_difficulty_type>();
-    return short_res;
+//    wide_difficulty_type short_res = res.convert_to<wide_difficulty_type>();
+    return res;
     CATCH_ENTRY_WITH_FORWARDING_EXCEPTION();
   }
 
diff --git a/src/currency_core/currency_format_utils.h b/src/currency_core/currency_format_utils.h
index 4b1aa928..513df6f1 100644
--- a/src/currency_core/currency_format_utils.h
+++ b/src/currency_core/currency_format_utils.h
@@ -604,7 +604,7 @@ namespace currency
     wide_difficulty_type pow_diff;
   };
 
-  wide_difficulty_type get_a_to_b_relative_cumulative_difficulty(const wide_difficulty_type& difficulty_pos_at_split_point,
+  boost::multiprecision::uint1024_t get_a_to_b_relative_cumulative_difficulty(const wide_difficulty_type& difficulty_pos_at_split_point,
     const wide_difficulty_type& difficulty_pow_at_split_point,
     const difficulties& a_diff, 
     const difficulties& b_diff