I don't understand how the search is calculated in this particular range.
Explain in a nutshell.
Start range is subtracted from
End range to make a new range between 0 and end-start, which is searched instead.
Then we make a batch, or herd, of 1024 starting points, with tames and wild points overlapping each other like this: Tame Wild Tame Wild Tame... The tame random points between 0 and end-start=range, and the wild points will have them between -range/2 and range/2. These are the starting points
We take some random numbers, the same amount as herd points, between 0 and range/2 as "jump points" and subtract them from our herd points. Resulting numbers are then placed in an Group (which in Kangaroo is just defined as a collection of numbers) and ModInv is applied to all of them.
For iteration we compute:
Rx = (Py - JumpPointY [mod n]
* Group [mod n])
^2 [mod n]
- JumpPointX [mod n]
- Py [mod n]
Ry = Px - Rx [mod n]
* (Py - JumpPointY [mod n]
* Group [mod n])
- Py [mod n]
For each g in CPU_GRP_SIZE (2014)
And the search points P are replaced with the ones in R.
Guys fyi 1024 is not div point in ecc, posting here, divideable magic digits for ecc, these will help you to decide bitrange to divide, use these magic ecc div numbers, for pollard kanagroo or other manual div