Just like cameras, Neil gives his requirements in Megapixcels not Megabytes
So 3MP or better for articles and 6MP or better if you want a bit more pocket money and bragging rights to get your photo on the front cover.
Memory wise 3MP is about 1MB. I’m currently using the phone’s default 8MP which varies a bit but average would be 3MB. Assuming its a JPEG, other compressions will differ.
So Howard is sending about th eminimum requirement and as Bernard says better won’t hurt.