#13000: Creating integers with very large base
------------------------------------+---------------------------------------
Reporter: roed | Owner: AlexGhitza
Type: defect | Status: positive_review
Priority: major | Milestone: sage-5.1
Component: basic arithmetic | Resolution:
Keywords: | Work issues:
Report Upstream: N/A | Reviewers: Keshav Kini
Authors: David Roe | Merged in:
Dependencies: | Stopgaps:
------------------------------------+---------------------------------------
Changes (by kini):
* status: needs_review => positive_review
Old description:
> {{{
> sage: a=ZZ(randint(0,2^128-1)).digits(2^64)
> sage: a
> [1154963902035838039, 8176620537326016718]
> sage: ZZ(a,2^64)
> ---------------------------------------------------------------------------
> OverflowError Traceback (most recent call
> last)
>
> /opt/sage-5.1.beta0/devel/sage-main/<ipython console> in <module>()
>
> /opt/sage-5.1.beta0/local/lib/python2.7/site-
> packages/sage/structure/parent.so in
> sage.structure.parent.Parent.__call__ (sage/structure/parent.c:8027)()
>
> /opt/sage-5.1.beta0/local/lib/python2.7/site-
> packages/sage/structure/coerce_maps.so in
> sage.structure.coerce_maps.DefaultConvertMap_unique._call_with_args
> (sage/structure/coerce_maps.c:3796)()
>
> /opt/sage-5.1.beta0/local/lib/python2.7/site-
> packages/sage/structure/coerce_maps.so in
> sage.structure.coerce_maps.DefaultConvertMap_unique._call_with_args
> (sage/structure/coerce_maps.c:3665)()
>
> /opt/sage-5.1.beta0/local/lib/python2.7/site-
> packages/sage/rings/integer.so in sage.rings.integer.Integer.__init__
> (sage/rings/integer.c:6304)()
>
> OverflowError: Python int too large to convert to C long
> }}}
New description:
{{{
sage: a=ZZ(randint(0,2^128-1)).digits(2^64)
sage: a
[1154963902035838039, 8176620537326016718]
sage: ZZ(a,2^64)
---------------------------------------------------------------------------
OverflowError Traceback (most recent call
last)
/opt/sage-5.1.beta0/devel/sage-main/<ipython console> in <module>()
/opt/sage-5.1.beta0/local/lib/python2.7/site-
packages/sage/structure/parent.so in sage.structure.parent.Parent.__call__
(sage/structure/parent.c:8027)()
/opt/sage-5.1.beta0/local/lib/python2.7/site-
packages/sage/structure/coerce_maps.so in
sage.structure.coerce_maps.DefaultConvertMap_unique._call_with_args
(sage/structure/coerce_maps.c:3796)()
/opt/sage-5.1.beta0/local/lib/python2.7/site-
packages/sage/structure/coerce_maps.so in
sage.structure.coerce_maps.DefaultConvertMap_unique._call_with_args
(sage/structure/coerce_maps.c:3665)()
/opt/sage-5.1.beta0/local/lib/python2.7/site-
packages/sage/rings/integer.so in sage.rings.integer.Integer.__init__
(sage/rings/integer.c:6304)()
OverflowError: Python int too large to convert to C long
}}}
---
Apply [attachment:13000.2.patch].
--
Comment:
I added a commit message.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13000#comment:5>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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