| 1 | initial version |
A workaround (which is probably not efficient) is:
sage: A = Zmod(2**256)
sage: R.<x,y> = PolynomialRing(A, implementation='generic')
sage: R(2**64)
18446744073709551616
Copyright Sage, 2010. Some rights reserved under creative commons license. Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.