A man who sodomized an innocent child should receive the death sentence. The crime is so horrendous, that he should pay for it with his life. That would be a suitable punishment. There are other criminals that are serving 100 year sentences, but sheer horror of this crime makes death the only penalty.
Realistically, there's no difference between a 100-year prison sentence and a 150-year prison sentence. Either way, the person convicted is going to be in prison for the rest of his life, so it doesn't matter. The point is to keep him off the streets so he can't commit horrible acts anymore, and that is accomplished either way.
The man who sodomized an innocent child should receive the death penalty, not more time in prison. If the death penalty, for some loophole reason, can not be given to this man he should never be allowed outside of prison walls. It doesn't matter whether the legal system calls it an over a century sentence or not.
No, he should not receive more time in prison. While what he did was terrible and unforgivable, we still have to think about that man's life. He spent over a century - 100 years - in prison. That's already more than most people live. By the time he gets out, he will not have much of a life to live anymore, and he has already spent over a hundred years in prison.