1976....Intel 8080....
@ Neil_Barnes
Take a look at this PDF: https://gmplib.org/gmp-man-6.0.0a.pdf
How does Tiny Basic on an 8080 deal with multiple precision arithmetic?
And if you happen to be emulating CP/M-80, perhaps you could get BDS C to work with gmp.....or maybe not!
Biting the hand that feeds IT
