[GAP Forum] "Error, no method found" in IsIrreducibleRingElement

[Bill Allombert]

On Mon, Jul 25, 2016 at 12:33:18PM +0000, Hulpke,Alexander wrote:
> Dear Charles Greathouse, Dear Forum,
> 
> On Jul 6, 2016, at 8:38 PM, Charles Greathouse <crgreathouse at gmail.com<mailto:crgreathouse at gmail.com>> wrote:
> 
> I'm having trouble getting IsIrreducibleRingElement (and IsPrime) working
> on SmallRing elements. For example:
> 
> 
> Switching rings, elements, versions, and operating systems hasn't helped.
> 
> The built-in irreducibility tests are currently only available for the
> integers (and some rings of integers) and polynomial rings over
> fields. There is no method for the small rings, which is the reason
> for the error message you received.

All elements in a finite ring are either invertible or divisors of
zero so in both case are not irreducible nor prime.

So it should just return false.

Cheers,
Bill.