Hiya! I just picked this up as part of the "No ICE in CA" bundle. The idea of using primes as a specific result blew my mind. Anyway I put together a little table of the regular d4-d20s, their probabilities of a critical success (1), their probability of hitting a prime, and the sum of the two (I was thinking of it in terms of a prime being a success, and you can use larger dice for more difficult attempts).
I then appended the same 1 and prime probabilities for the weirdo DCC dice (d5-d30), for people who might want to use those.
It's not the same as Dodeca, as it wouldn't be an oracle, but rather a resolution mechanic for a game with a GM, though now that I'm thinking about it, certainly a solo player could use it if they wanted to for resolutions of attempted actions. They could, for example, replace the percentiles in Mythic based on the odds determination, if a person prefers to use a bunch of different dice...
Anyway, here's the table. I may write this up as a one pager and post it on its own, I don't know.
| Die | Prob of 1 | No of primes | Prime prob | Success |
| 4 | 0.250 | 2 | 0.500 | 0.750 |
| 6 | 0.167 | 3 | 0.333 | 0.500 |
| 8 | 0.125 | 4 | 0.250 | 0.375 |
| 10 | 0.100 | 4 | 0.250 | 0.350 |
| 12 | 0.083 | 5 | 0.200 | 0.283 |
| 20 | 0.050 | 8 | 0.125 | 0.175 |
| 5 | 0.200 | 3 | 0.333 | 0.533 |
| 7 | 0.143 | 4 | 0.250 | 0.393 |
| 14 | 0.071 | 6 | 0.167 | 0.238 |
| 16 | 0.063 | 6 | 0.167 | 0.229 |
| 24 | 0.042 | 9 | 0.111 | 0.153 |
| 30 | 0.033 | 10 | 0.100 | 0.133 |