If anything, it's strong evidence the other way. If, in the process of trying to figure out whether you're really Jesus, you find yourself using a statistical formula not discovered until the eighteenth century CE, you should probably err on the side of "no."
I don't think the mental-asylum Jesuses believe that they live in Jesus' time, so no contradiction with 18th century math arises.
Yvain isn't a big enough self-promoter to link to this, but I liked it a lot and I think you will too.
"The Last Temptation of Christ"