Base 12 is as arbitrary as base 10 and we don’t know what aliens would think nor should we care. Base 16 makes more sense because it is 2x2x2x2 instead of 2x2x3
A base based on 2^x makes the most sense since it’s easy to do conversions between bases that match that template. So base 2, 4, 8, 16, 32, etc. The limit would just be how many symbols can be easily remembered and instantly recognizable (need 32 symbols for base 32).
Base 12 is as arbitrary as base 10 and we don’t know what aliens would think nor should we care. Base 16 makes more sense because it is 2x2x2x2 instead of 2x2x3
A base based on 2^x makes the most sense since it’s easy to do conversions between bases that match that template. So base 2, 4, 8, 16, 32, etc. The limit would just be how many symbols can be easily remembered and instantly recognizable (need 32 symbols for base 32).