looking at: https://ieeexplore.ieee.org/abstract/document/673365
Very strong magnetic field can make discovery of transistor hard or even not possible. Influence of magnetic field can make transistors hard to be usable and not possible to miniaturisation wich leads to no silicon computers at all. Lamp computers size are limited too.
Possible is a construction of mechanical computers but they will be big and heavy - can make them at orbit but taking them from planet will cost too much.