Error trying a brute force - integer overflow?

[epixoip]

Keyspace is stored in a uint64 so the maximum value it can hold is 2^64 - 1. Your keyspace is 2^72.26 .. 2^118.25, so yes, integer overflow.

And yes, as rico identified, this keyspace is impossibly large. You will never brute force keyspaces that large, not even using all the computers that have ever existed.