Rewrite how we find indices in order to cofactorize + improvement in MNFS.
Rewrite how we find indices in order to cofactorize + improvement in MNFS.

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