3 ms·24x1 + 1 = 25, so we're off to a bad start.by gatehouse 12y ago24x1 + 1 = 25, so we're off to a bad start.Someone 12y agoBut it gets better soon: 24x2 + 1 = 49 and that is prime, isn't it? :-)tlammens 12y agoYou forget the square root: 5 is prime.stbarnes 12y agohuh? great-grandparent said nothing about square roots