Make inversion function handle even modulus. A bug in general root extraction code seems to remain
Make inversion function handle even modulus. A bug in general root extraction code seems to remain

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