I’m taking a look at older threads with cpu benchmarks, and a guess is that you can expect 5 sols/s on your cpu. In isolation, it may be slightly profitable.
This at this rate, you will need to mine for around 20 days at the current difficulty (generously not accounting for increase in difficulty) to find a block.
The cpu runs at 50W? so you will consume ~1KWh to find your first block.
you will earn: 1block1.5aion/block2.28$/aion=3.42$
Minus electricity cost, let’s say 8 cents/KWh.
Profit = 3,34$
If you have the possibility to mine on a gpu however, the opportunity cost will be much higher because mining on the cpu probably will decrease the efficiency of the gpu, and result in lower total sol/s output than simply mining on the gpu.
The above calculation also doesn’t account for overhead power costs, which may be 50+% for cpu mining, and 5% on a gpu rig.
Tl;dr don’t mine on cpu