Tableau des logarithmes de base 10, base 2 et base e (ln):
| x | bûche 10 x | bûche 2 x | log e x |
|---|---|---|---|
| 0 | indéfini | indéfini | indéfini |
| 0 + | - ∞ | - ∞ | - ∞ |
| 0,0001 | -4 | -13,287712 | -9,210340 |
| 0,001 | -3 | -9,965784 | -6.907755 |
| 0,01 | -2 | -6,643856 | -4.605170 |
| 0,1 | -1 | -3,321928 | -2,302585 |
| 1 | 0 | 0 | 0 |
| 2 | 0,301030 | 1 | 0,693147 |
| 3 | 0,477121 | 1,584963 | 1,098612 |
| 4 | 0,602060 | 2 | 1,386294 |
| 5 | 0,698970 | 2,321928 | 1,609438 |
| 6 | 0,778151 | 2,584963 | 1,791759 |
| 7 | 0,845098 | 2.807355 | 1,945910 |
| 8 | 0,903090 | 3 | 2,079442 |
| 9 | 0,954243 | 3,169925 | 2,197225 |
| 10 | 1 | 3,321928 | 2.302585 |
| 20 | 1.301030 | 4,321928 | 2.995732 |
| 30 | 1.477121 | 4,906891 | 3.401197 |
| 40 | 1,602060 | 5,321928 | 3.688879 |
| 50 | 1,698970 | 5,643856 | 3.912023 |
| 60 | 1.778151 | 5,906991 | 4,094345 |
| 70 | 1,845098 | 6.129283 | 4.248495 |
| 80 | 1.903090 | 6,321928 | 4,382027 |
| 90 | 1.954243 | 6,491853 | 4,499810 |
| 100 | 2 | 6,643856 | 4.605170 |
| 200 | 2.301030 | 7,643856 | 5,298317 |
| 300 | 2.477121 | 8.228819 | 5,703782 |
| 400 | 2.602060 | 8.643856 | 5,991465 |
| 500 | 2,698970 | 8,965784 | 6,214608 |
| 600 | 2.778151 | 9.228819 | 6,396930 |
| 700 | 2,845098 | 9.451211 | 6,551080 |
| 800 | 2,903090 | 9,643856 | 6,684612 |
| 900 | 2.954243 | 9,813781 | 6,802395 |
| 1000 | 3 | 9,965784 | 6,907755 |
| 10 000 | 4 | 13,287712 | 9.210340 |