Here's the audio of the full phone call between Trump and the Georgia Secretary of State.
It's pathetic, but as usual the media doesn't report it honestly. Trump isn't saying to just change the numbers to give him the 11,000+ he needs. He's saying there's evidence of many tens of even hundreds of thousands of fraudulent votes, but the Secretary of State doesn't need to find them all, just investigate up to the point he's proven the outcome was fraudulent. It's bullshit, of course, but it's different than just asking the number to be rewritten, and no doubt Trump sincerely believes there's such a large number of fraudulent votes.
I'm not sure what he thinks could be accomplished. Georgia's votes wouldn't get him near victory. Early on Trump does claim that other swing states' votes are going to be flipping soon, but surely he can't believe that. I took it as a pathetic attempt to persuade Georgia SOS that he'd be the only holdout, and look bad for being so. Throughout Trump insults, berates, and attempts to bully the SOS in his typical way.
One can only imagine the weary frustration of the SOS and his people as they sat through this surely biting their tongues to remain as calm and polite, and say as little, as possible.