Fix mistakes in test case descriptions

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/tests/suites/test_suite_mpi.data b/tests/suites/test_suite_mpi.data
index 24bbc6a..1671d6e 100644
--- a/tests/suites/test_suite_mpi.data
+++ b/tests/suites/test_suite_mpi.data
@@ -1144,7 +1144,7 @@
 MPI random in range: 1..2^71+1
 mpi_random_many:1:"800000000000000001":100
 
-MPI random in range: 1..2^71+2^63
+MPI random in range: 1..2^71+2^70
 mpi_random_many:1:"c00000000000000000":100
 
 MPI random in range: 1..2^72-1
@@ -1156,7 +1156,7 @@
 MPI random in range: 1..2^72+1
 mpi_random_many:1:"01000000000000000001":100
 
-MPI random in range: 1..2^72+2^63
+MPI random in range: 1..2^72+2^71
 mpi_random_many:1:"01800000000000000000":100
 
 MPI random in range: 0..1