$ ./runtest
128 bits, 20 trials
real    0m0.650s
user    0m0.520s
sys     0m0.020s
 
256 bits, 20 trials
real    0m1.530s
user    0m1.340s
sys     0m0.000s
 
512 bits, 20 trials
real    0m8.759s
user    0m8.580s
sys     0m0.030s
 
768 bits, 20 trials
real    0m32.070s
user    0m31.500s
sys     0m0.010s
 
1024 bits, 20 trials
real    2m3.161s
user    2m2.620s
sys     0m0.030s