“The Kirkland facebook is open on my computer desktop and some of these people have pretty horrendous facebook pics,” he wrote. “I almost want to put some of these faces next to pictures of farm animals and have people vote on which is more attractive.”

Then, just before 1 a.m., a new post: “12:58am. Let the hacking begin.”

Starting with Kirkland and moving his way through the Houses, Zuckerberg described how he hacked into online facebooks one by one and put the photos onto his website.

Around 4 a.m. last Wednesday, Zuckerberg finished compiling ID photos of all undergraduates except for first-years and residents of Winthrop, Currier and Quincy, whose facebooks are not available online.

In his online account, Zuckerberg called the hacking “Child’s play.”

He describes how he got the photos from each House and then records the actions he took over the next few days to create the algorithms and codes to create the rating website.

Just before 7:30 a.m. on the morning of Halloween, he wrote that the site was finished.

Zuckerberg said his primary attraction to building the website was the science of creating the program and compiling the photos, not the prospect of publicizing it for widespread use.

“I’m a programmer and I’m interested in the algorithms and math behind it,” said Zuckerberg, who is no stranger to creating computer software and programs.

He received worldwide notice for an MP3-player that he created during his senior year at Philips Exeter Academy.

And at the beginning of this year, Zuckerberg said he created a “coursematch” website where students could voluntarily submit the courses they were taking so that other students in the same courses could find out who their peers were.