Nam Nguyen wrote: > On 10/08/2013 9:23 AM, jim wrote: >> Is there any way to combine 2 primes to get a larger prime, either >> guarantying the primality of the result or with a quick test for the >> primality? > > No. Primality of primes can be defined intrinsically by the properties > of _individuals_ independent from any relations or functions, including > the "less than" relation.
What makes you think that? Or, to begin at the beginning, what do you mean by that?