Steps To Reproduce

On Sage 10.3 running in CoCalc, run

sage: GL(2,Integers(4)).order()
180
sage: GL(2,Integers(1)).order()
0

Expected Behavior

sage: GL(2,Integers(4)).order()
96
sage: GL(2,Integers(1)).order()
1

First one works in sage version 10.2, second one returns recursion error.

Actual Behavior

See above. Seems to be computing GL(2,Integers(q)).order() as (q-1)^2q(q+1).

Additional Information

Explanation of correct computation: here.

Environment

- **OS**: CoCalc
- **Sage Version**: 10.3

Checklist

• I have searched the existing issues for a bug report that matches the one I want to file, without success.
• I have read the documentation and troubleshoot guide