Fix types

Author: WrathfulSpatula

find_a_factor

@@ -38,7 +38,7 @@ def main():
     if argv_len > 8:
         batch_size_multiplier = float(sys.argv[8])
     if argv_len > 9:
-        batch_size_variance = float(sys.argv[9])
+        batch_size_variance = int(sys.argv[9])
     if argv_len > 10:
         trial_division_level = int(sys.argv[10])