Google Brain's Attention Is All You Need paper on sequence-to-sequence translation reports:
Our model achieves 28.4 BLEU on the WMT 2014 Englishto-German translation task, improving over the existing best results, including ensembles, by over 2 BLEU
but the Wikipedia entry on BLEU says:
BLEU’s output is always a number between 0 and 1
What definition of BLEU is the Google Brain paper using? I could not find a separate definition in the paper itself.