Somewhat slower but safer bin_gcd_int64_safe()
Somewhat slower but safer bin_gcd_int64_safe()

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