Memory test that fails with a different address each time
I haven't been able to find documentation of what these fields mean.

However, given that memory failures that I've seen and those posted by others all appear to be around "address" 0x842XXXXX, I suspect that this is not in fact the address. It may be the pattern being written to some address when the failure occurred.

The field where you have a value of 62 seems to be the only one that varies significantly. It may be that this value represents the address to some very course degree (eg. maybe 1-64 could represent one DIMM and 65-128 the other; or maybe odd numbers vs even numbers).

It would be nice if Apple would document these very basic and useful error code formats.