I am new to this but i have downloaded and installed GMP library. The problem is that i have no clue on how to use it! Want to get a number larger than 18*10^18 (unsigned long long) but i dont know how! I am confused with all the mpz and mpf... and there is no any proper index out there (as far as i have searched)! Also i need the same with float and negative float numbers... any help? thx in adv.