You can set up bc to any scale by adding scale=INTEGER for some reasonable INTEGER, say, 6, to your ~/.bc file (you need to also export BC_ENV_ARGS=~/.bc)

You can set up bc to any scale by adding scale=INTEGER for some reasonable INTEGER, say, 6, to your ~/.bc file (you need to also export BC_ENV_ARGS=~/.bc), or alias bc to bc -l). After having gp-pari fail after a brew upgrade I started using bc instead and have been relatively happy so far (although I miss isprime and factors which I used sparingly)