Logarithm of a Number Greater Than 1: Characteristic, Mantissa & Antilogarithm

This lesson explains how to find the logarithm of a number greater than 1 using log tables. You’ll learn how to split a logarithm into its two parts — the characteristic (integer part) and the mantissa (decimal part) — and how the characteristic relates to the number of digits before the decimal point, tying it directly to standard form (A × 10ⁿ). The lesson also covers how to use antilogarithm tables to reverse the process, converting a given logarithm back into its original number, with clear step-by-step worked examples throughout.