The Dawning Nebulae computer has achieved a sustained speed of 1.27 petaflops — the equivalent of one thousand trillion mathematical operations a second.

Prudential remained locked in talks on Monday over its purchase of the American International Group’s huge Asian life insurance arm, a deal that could be in jeopardy, said people briefed on the negotiations.

Recent improvements in the health of European banks could be undercut by weak growth and the debt crisis, the European Central Bank said Monday.

Lawyers say that a growing number of businesses are suing individuals for posting critical comments online.

A Chinese supercomputer has ranked as the world’s second fastest machine, surpassing European and Japanese systems.