Earth-boring tools, methods of forming earth-boring tools, and methods of forming a borehole in a subterranean formation

A method of forming an earth-boring tool, comprising:

• forming a body comprising a face at a leading end thereof, blades extending from the body and comprising primary blades and secondary blades;
• and
• disposing cutting elements on the blades in groups each comprising neighboring cutting elements sequentially positioned directly radially adjacent one another across the face of the body, wherein:
• all of the cutting elements disposed on the primary blades belong to groups exhibiting a first spiral configuration;
• and
• all of the cutting elements disposed on the secondary blades belong to additional groups exhibiting a second spiral configuration opposing the first spiral configuration.

A method of forming a borehole in a subterranean formation, comprising:

• disposing an earth-boring tool at a distal end of a drill string in a borehole in a subterranean formation, the earth-boring tool comprising:
• a body having a face at a leading end thereof;
• blades extending from the body and comprising primary blades and secondary blades;
• and
• cutting elements on the blades and arranged in groups each comprising neighboring cutting elements sequentially positioned directly radially adjacent one another across the face of the body, wherein:
• all of the cutting elements disposed on the primary blades belong to groups exhibiting a first spiral configuration;
• and
• all of the cutting elements disposed on the secondary blades belong to additional groups exhibiting a second spiral configuration opposing the first spiral configuration;
• applying weight on bit to the earth-boring tool through the drill string to contact the subterranean formation while rotating the earth-boring tool;
• and
• engaging the subterranean formation with the cutting elements of the rotating earth-boring tool.