no technique, no artifact, no math.
Only the IMPROBABLE luck will give the chance to discover the puzzles 135-140-145-150-155-160.
Unless you invest tens of thousands of $ in GPU and electricity + time.
The cost of breaking 135 is closer to 1 million $, for a 99.999% chance of success. That is only the price for paying the electricity bill. You also need a bullet-proof distributed management system to sync data.
Relying on luck without a risk strategy will just end up as losing time and money.