reduced guess_factor from 0.91 to 0.80
reduced guess_factor from 0.91 to 0.80

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