#13596: Improvements to IntegerMod is_square
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Reporter: roed | Owner: AlexGhitza
Type: enhancement | Status: new
Priority: major | Milestone: sage-5.5
Component: basic arithmetic | Keywords:
Work issues: | Report Upstream: N/A
Reviewers: | Authors: David Roe
Merged in: | Dependencies:
Stopgaps: |
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Currently we fall back on PARI if 4 divides the modulus, and we don't
check first to see if the jacobi symbol is -1 (in which case we can
declare a quadratic non-residue without factoring the modulus). This
patch fixes both problems.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13596>
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