Sixty-five million sound like deal by any standard. That's the size of the improvement that an online army of collaborating mathematicians has already made to a groundbreaking proof involving pairs of prime numbers, which was first announced just a few week ago.
Though the improvement is big, mathematically speaking it amounts to a technicality. Still, the achievement showcases a new way of doing mathematics online. Since the proof appeared, mathematicians from across the world have been locked in an addictive race to tighten it up.