#7923: signed int overflow in givaro elements' __pow__ method
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Reporter: roed | Owner: AlexGhitza
Type: defect | Status: new
Priority: major | Milestone: sage-4.3.1
Component: basic arithmetic | Keywords:
Work_issues: | Author:
Upstream: N/A | Reviewer:
Merged: |
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When 2^31 < q^2 < 2^32, one can get an overflow in exponentiation (because
of the use of signed vs unsigned ints). This occurs for q=3^10.
{{{
sage: K.<a> = GF(3^10)
sage: b = a^9 + a^7 + 2*a^6 + a^4 + a^3 + 2*a^2 + a + 2
sage: b^(71*7381) == (b^71)^7381
False
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7923>
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