#4777: [with patch; needs review] Sage is_prime_power is seriously buggy,
because
pari's ispower is BROKEN
------------------------------+---------------------------------------------
Reporter: was | Owner: somebody
Type: defect | Status: new
Priority: critical | Milestone: sage-3.2.2
Component: basic arithmetic | Resolution:
Keywords: |
------------------------------+---------------------------------------------
Changes (by was):
* summary: Sage is_prime_power is seriously buggy, because pari's
ispower is BROKEN => [with patch; needs review]
Sage is_prime_power is seriously buggy, because
pari's ispower is BROKEN
Comment:
BEFORE patch:
{{{
teragon-2:~ wstein$ sage
----------------------------------------------------------------------
| Sage Version 3.2.1, Release Date: 2008-12-01 |
| Type notebook() for the GUI, and license() for information. |
----------------------------------------------------------------------
sage: n = 150607571^14
sage: n.is_prime_power()
False
}}}
AFTER patch:
{{{
sage: n = 150607571^14
sage: n.is_prime_power()
True
}}}
And I'm making this a blocker, since it is a situation where one can
silently get very wrong answers.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/4777#comment:1>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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