diff -up boost_1_81_0/libs/random/test/multiprecision_float_test.cpp.testfix boost_1_81_0/libs/random/test/multiprecision_float_test.cpp
--- boost_1_81_0/libs/random/test/multiprecision_float_test.cpp.testfix	2023-08-29 16:07:40.127905519 -0400
+++ boost_1_81_0/libs/random/test/multiprecision_float_test.cpp	2023-08-29 16:08:44.114856281 -0400
@@ -77,7 +77,7 @@ typedef boost::mpl::list <
    boost::random::lognormal_distribution<big_float>,
    boost::random::normal_distribution<big_float>,
 #ifndef BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS
-   boost::random::piecewise_constant_distribution<big_float>,
+   boost::random::piecewise_constant_distribution<big_float, big_float>,
    boost::random::piecewise_linear_distribution<big_float>,
 #endif
    boost::random::student_t_distribution<big_float>,
diff -up boost_1_81_0/libs/random/test/multiprecision_int_test.cpp.testfix boost_1_81_0/libs/random/test/multiprecision_int_test.cpp
--- boost_1_81_0/libs/random/test/multiprecision_int_test.cpp.testfix	2023-08-29 16:06:58.543287627 -0400
+++ boost_1_81_0/libs/random/test/multiprecision_int_test.cpp	2023-08-29 16:07:26.788707316 -0400
@@ -216,7 +216,11 @@ BOOST_AUTO_TEST_CASE_TEMPLATE(discrete_d
    ss >> d2;
    BOOST_CHECK(d == d2);
 
-   boost::random::independent_bits_engine<boost::random::mt19937, std::numeric_limits<boost::multiprecision::uint1024_t>::digits, boost::multiprecision::uint1024_t > big_random;
+   //
+   // The number of digits in the independent_bits_engine must be low enough that we don't overflow
+   // when converting to a double (see other_distributions declared above).
+   //
+   boost::random::independent_bits_engine<boost::random::mt19937, std::numeric_limits<boost::multiprecision::uint1024_t>::digits - 2, boost::multiprecision::uint1024_t > big_random;
    for(unsigned i = 0; i < 200; ++i)
    {
       result_type r = d(big_random);