Hello developers I noticed that there is also a CUMP site http:/www.hpcs.cs.tsukuba.ac.jp/~nakayama/cump/ which offers the same as GMP for CUDA card parallelisation. However, can this not be incorporated with GMP in a later version with a compile option e.g. --enable-CUDA , instead of using the CUMP_prefix in all the existing code? Regards R. G. Panday