There is project called
Large Bitcoin Collider which uses the hashing power of involved folks for finding collision. Currently LBC is capable to generate on average up to 90Mkeys/sec. Please, have a look on their trophies so far:
-snip-The probability to find collision with LBC is vanishingly small, but...there is always a but.
Those "
trophies" are specifically created from private keys with a very small search-space.
e.g.: starting from 0x01, 0x03, 0x07.... 0x236fb6d5ad1f43 (
#54) and higher ranges.
They are merely bruteforcing private keys starting from 0x01 to their target range of the puzzle transaction (
link) to match the
same private key used by the creator of the puzzle.
It has nothing to do with collision.