Just curious...why did this prime take so long to test (and to verify)? According to the official announcement, both took ~70 hours apiece, but about a week ago one of my PRPnet clients (on a Core 2 Duo E4500, very similar to the discoverer's computer) fell back to the primorial server and tested 844309#-1 in ~4.5 hours. Considering that the n-value of my test was actually a little bigger than the prime's, surely mine should have taken longer (though they're close enough that I'd expect the difference to be minimal).
The only possible difference I can see is that my computer used 32-bit PFGW, whereas the discoverer's used 64-bit PFGW. Perhaps this is the cause of the discrepancy (though normally 64-bit should be faster)?