A better measure, assuming that pennies facilitate value exchange[1], would be whether the cost to mint a penny exceeded the marginal increase in GDP[2] due to having that additional penny available.
[1]: This assumption may not be true; if they're worth so little that people lose track of them, they could actually make it harder to exchange value.
[2]: Making the GDP higher is also a very debatable measure, but I think this generalizes to other dollar-denominated measures of prosperity.
A penny is reused over and over again, every time it changes hands. It’s not necessarily bad that it costs a few cents to make one if it has utility.
It costs more to make a ceramic mug than it does to fill it with coffee. That doesn’t make a ceramic mug uneconomical, because it’s used lots of times and the cost amortizes.
...Having said that, I don’t think there’s actually much value to having an individual token of exchange that signifies as little value as a penny does - it would be a good idea to stop making them even if they cost far less to make than they do.
I agree with you on that - that’s what my last paragraph was trying to convey. I don’t think pennies are necessary, and we are (were) wasting money making them. Nickels and dimes are probably in the same boat.
But I was replying to your reply to a comment which said “I don’t understand why it costing more than face value to mint is such a bad thing” which you antagonistically and derisively called “one of the stupidest comments I have seen on the internet bar none”. It wasn’t a stupid comment.