In article <firstname.lastname@example.org> Musatov <email@example.com> writes: ... When are you going to stop to post these mindless conjectures based on a very small number of cases?
> Consider each case: > > For four: (#4) > > 2*4+1=9 not prime > 2*14+1=29 prime > 2*24+1=49 not prime > > In the above instances "N" ends in "4" and is not prime, the formula > produces a number with square prime factors (i.e. 3*3=9 and 7*7=49). > (i.e. When it does not produce a prime the composite is a prime > squared).