I recently took a DNA test through 23me and results from a brother were 54.1 and 46 segments shared n genomes. He does not show on the paternal side of this testing, can anyone tell me if we share the same father from this results in the DNA testing. It was not a specific paternal testing and I really don't understand DNA testing,
If you and your tested brother has the same father than three of you would have certain number of similar fragments, these fragments would represent autosomes from your father that you and your brother are likely to inherit.
You and your brother would not inherit 100% same autosomal segments from your father but there would be a certain percentage that would show same pattern.
In addition, your brother would show the same Y chromosome fragment/complement as yours and his father.
As Hafid pointed, I am not sure what those number imply.
I hope this helps.