by the new prst app. There are some issues with similar CPUs and Riesel Bases (-1), Sierpinski Base is fine:

GenuineIntel Intel(R) Celeron(R) J4125 CPU @ 2.00GHz [Family 6 Model 122 Stepping 8]
GenuineIntel Intel(R) Celeron(R) CPU N3150 @ 1.60GHz [Family 6 Model 76 Stepping 3]
GenuineIntel Intel(R) Pentium(R) Silver J5005 CPU @ 1.50GHz [Family 6 Model 122 Stepping 1]
1 (0x1) Unknown error number


The gwnum must have a bug, already reported to the dev.

If you have such errors with these CPUs, disable work for -1 bases until this is fixed.

Source