| N FACT(N) STIR(N) Accuracy (%) | |
| 1 1 0.922137 7.7863 | |
| 2 2 1.919 4.04978 | |
| 3 6 5.83621 2.72984 | |
| 4 24 23.5062 2.0576 | |
| 5 120 118.019 1.65068 | |
| 6 720 710.078 1.37802 | |
| 7 5040 4980.39 1.18265 | |
| 8 40320 39902.4 1.03572 | |
| 9 362880 359537 0.921241 | |
| 10 3628800 3.5987e+06 0.829565 | |
| 11 3.99168e+07 3.96156e+07 0.754479 | |
| 12 4.79002e+08 4.75688e+08 0.691846 | |
| 13 6.22702e+09 6.18724e+09 0.638884 | |
| 14 8.71783e+10 8.66611e+10 0.593222 | |
| 15 1.30767e+12 1.30043e+12 0.553797 | |
| 16 2.09228e+13 2.08141e+13 0.519387 | |
| 17 3.55687e+14 3.53948e+14 0.48891 | |
| 18 6.40237e+15 6.3728e+15 0.461873 | |
| 19 1.21645e+17 1.21113e+17 0.437677 | |
| 20 2.4329e+18 2.42279e+18 0.415689 | |