Add chains for B1=256, improve B1=100, B1=128, B1=256
Add chains for B1=256, improve B1=100, B1=128, B1=256

mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs