Page 64, in the first paragraph of Section 5.2, change "x = a/b" to "x = b/a". Page 100, line 2 of Section 7.3. The exponent on p_i in the product should be e_i, not e_e. Page 106, in the algorithm for square root of a modulo p, change the for loop limits to: for (1 <= i <= e) .