Help with -m 3730 mode

[Snoopy]

I have an algorithm for john the ripper that can brute force long hashes, but there is no opencl support. As I understood in this mod also interaction with long hashes. And I can't understand where the values after the hash: 229381927:182719643 come from. The script in john the ripper has this example: $dynamic_2868$hash$serial number$$User

no mode 3730 is not for interacting with long hashes, each oder 99% of hash algorithms have a fixed output

according to hashcat example hashes mode 3730 is defined as

Dahua NVR/DVR/HVR (md5($salt1.strtoupper(md5($salt2.$pass)))) * 0e1484eb061b8e9cfd81868bba1dc4a0:229381927:182719643

so in fact its a double salted md5 and the example has is MD5:Salt1:Salt2 and it seems it was used in *vr devices

salts are generated randomly by the hashalgorithm or generated by some other input

so what kind of hash to you want to attack, or which JtR script do you used?