ifactors Test Problem

[toml_12953]

(09-06-2017 05:16 PM)Helge Gabert Wrote:  Try storing DIM(ifactors(X)) into a list, say L1, and then try

IF L1(1) == 2 THEN . . .

Works here.

(This is because, in Home, a statement like {2}=={2} returns {1}, not 1).

But aside from that, why do you test DIM(ifactors(X)? That won't tell you if X is prime.

I thought that if the length of the ifactors vector returns 2 then there are only two factors, the number itself and 1. I was wrong. The list doesn't include 1 so dim(ifactors(8)) would return 2 as well.