I think the problem is abusing the factorization of the group order and later doing CRT.
The following code correctly raises exception: dl3=discrete_log_lambda(a,g,bounds=(1,p.isqrt())) ValueError: Pollard Lambda failed to find a log -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-devel/CAGUWgD8KEyzp%3DpcgNM2QDxK0HKguvO061Txz9mMVVT4rfw7HPQ%40mail.gmail.com.