Hackers claiming to have stolen data from AshleyMadison.com, a website that facilitates hookups between would-be adulterers, have released information they say includes details of more than 36 million user accounts.

The data dump appears to be "legit" and includes full names, email addresses, partial credit-card data and dating preferences, said Robert Graham, chief executive of Errata Security, a researcher in Atlanta. "This is data that can 'out' serious users," Graham said in a blog post. "I have verified multiple users of the site."

The hackers, calling themselves the "Impact Team," released a "readme" file with the data that said they posted the information because AshleyMadison hadn't been taken down, as they demanded when they said they had obtained the data last month.

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"Find someone you know in here? Keep in mind the site is a scam with thousands of fake female profiles," the note said.

Avid Life Media Inc. of Toronto, which operates the site, said in a statement that it is "monitoring and investigating this situation to determine the validity" of the information and is cooperating with probes by Canadian police and the FBI.-- Bloomberg News