Using Patsolve with both 8 GB of memory and swap I've been able to resolve the following deals as impossible (as well as 53687601, which is already known to be impossible):
552867833
2263394078
2622775407
2787062069
3767516184
3828100749
4699453568
5261758646
5659749576
7406170815
8203007169
Received on Sat Sep 10 2016 - 08:21:11 IDT