[Reincarnate]

Originally Posted by iironiic

Should 99 be in your sorted mainlist for Co(100)?

I'm thinking about an approach right now, but I haven't come up with anything yet.

sorted mainlist [1, 7, 11, 13, 16, 17, 19, 23, 25, 27, 29]
sum of mainlist 188
primes [2, 3, 5, 7, 11, 13, 17, 19, 23, 29]

This is what I get for Co(30) without that optimization and going for power-raising alone. Obviously I need to toss 28 into this beast, but in doing so I must remove 7 and 16.

EDIT: What I do now, in general is create the "naive prime-raised" solution and then add numbers to the solution and remove all coprime elements, then check to see if that sum is better than what I had before. If so, update solution. If not, kept what I had before and try a new number.