Gets to 2.92 in just under 4 days on 8 p100s.

def imagetransformerpp_base_14l_8h_big_uncond_dr03_dan_p():
  """Gets to 2.92 in just under 4 days on 8 p100s."""
  hparams = imagetransformerpp_base_12l_8h_big_uncond_dr03_dan_l()
  hparams.num_decoder_layers = 14
  hparams.batch_size = 8
  hparams.layer_prepostprocess_dropout = 0.2
  return hparams