Thanks...but I screwed up my formulas, ha. It's not as good in actuality--the lowest probability is still too high. Even if you include d100, the lowest probability of success is still 0.26. So, hrm, back to the drawing board...there may be something here though, I'll keep playing with it and I'll let you know if I write anything up.
| Die | Prob of 1 | No of primes | Prime prob | Success |
| 4 | 0.250 | 2 | 0.500 | 0.750 |
| 6 | 0.167 | 3 | 0.500 | 0.667 |
| 8 | 0.125 | 4 | 0.500 | 0.625 |
| 10 | 0.100 | 4 | 0.400 | 0.500 |
| 12 | 0.083 | 5 | 0.417 | 0.500 |
| 20 | 0.050 | 8 | 0.400 | 0.450 |
| 5 | 0.200 | 3 | 0.600 | 0.800 |
| 7 | 0.143 | 4 | 0.571 | 0.714 |
| 14 | 0.071 | 6 | 0.429 | 0.500 |
| 16 | 0.063 | 6 | 0.375 | 0.438 |
| 24 | 0.042 | 9 | 0.375 | 0.417 |
| 30 | 0.033 | 10 | 0.333 | 0.367 |