big2str_karatsuba 4835 bignum.c               big2str_karatsuba(b2s, qds, qn, xn+wn - (rn+qn), lower_power_level, lower_numdigits+taillen);
big2str_karatsuba 4837 bignum.c               big2str_karatsuba(b2s, rds, rn, xn+wn - rn, lower_power_level, taillen);
big2str_karatsuba 4942 bignum.c       	big2str_karatsuba(&b2s_data, wds, xn, wn, power_level, 0);