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Amateur effort finds new largest prime number

The Great Internet Mersenne Prime Search (GIMPS) project has scored its 14th consecutive victory, discovering the largest prime number so far.

The number, 2 to the power of 57,885,161 minus 1, is a digit that's 17,425,170 digits long. That's big enough that if you want to see the full text, you'll have to brace yourself for a 22.5MB download.

GIMPS, a cooperative project splitting the search across thousands of independent computers, announced the find yesterday after it had been confirmed by other checks. At present, there are 98,980 people and 574 … Read more

Sony to launch 4K video distribution system this summer

LAS VEGAS--One of the big problems with 4K TVs right now, aside from the fact that it's tough to discern any benefit from their extra resolution, is lack of content. Sony, alone among TV or content providers so far, actually aims to tackle that issue around the same time it launches its full line of 4K TVs later this year.

This summer the company will set up a dedicated video distribution service to deliver 4K content to the home, complete with a hardware 4K Video Player that can feed the TVs directly.

Currently buyers who pony up $25K for … Read more

The Undetectable Firearms Act and 3D-printed guns (FAQ)

Citing the threat of plastic, 3D-printed firearms, U.S. Rep. Steve Israel, D-N.Y., held a press conference this weekend calling for the renewal of the Undetectable Firearms Act. The act was originally conceived in 1988 in response to the Glock 17, a handgun with some components made from plastic composites.

The law has been renewed several times since its inception, most recently in 2003. It's currently due to expire in December 2013.

For gun rights advocates, the Undetectable Firearms Act comes across as legislative hand-wringing. Others find the law to be an example of security theatrics and a … Read more

Report: 3D-printed handgun project faces setback with revoked printer lease

When I last spoke with Cody Wilson, Defense Distributed had just met its $20,000 funding goal, and he had taken delivery of his Stratasys uPrint SE 3D printer. Fast forward nine days and the outlook for his 3D printed firearm project looks less positive.

As reported here in September, Defense Distributed, a group headed by University of Texas graduate student Wilson, began navigating the uncharted material and regulatory waters around designing a gun to be printed from common plastic on a relatively low-cost 3D printer like the MakerBot Replicator.

Now, Wired's Robert Beckhusen reports that Stratasys has voided … Read more

You don't bring a 3D printer to a gun fight -- yet

Welcome to the dark side of 3D printing.

The hobby is best known for creating colorful toys and trinkets, but some enthusiasts are working on design files that would allow anyone to print a working gun. These don't exist yet, but some believe it's only a matter of time.

Why would a 3D-printed gun be appealing? For one, it could potentially be cheap. You can buy a preassembled 3D printer for about $500. A spool of ABS plastic to print with goes for $50. Depending on where you shop, you can buy .38 Special ammunition for 30 cents a round. The plans will undoubted be distributed free like so many MP3s. … Read more

Yahoo, Clear Channel strike digital radio partnership

Yahoo is teaming up with radio giant Clear Channel on a distribution and cross-promotional deal, expanding on its strategy of striking content-sharing deals with traditional media brands.

The companies announced a partnership late Wednesday in which Yahoo will use Clear Channel's iHeartRadio platform as its official digital radio service. As part of the multi-year deal, Yahoo will carry nearly a dozen live Clear Channel events annually, as well as live video from this year's iHeartRadio Music Festival in Las Vegas.

iHeartRadio boasts a monthly audience of about 45 million unique listeners and 80 million downloads of its mobile … Read more

MIT 'smart sand' and 'robot pebbles' replicate objects

Researchers at MIT have developed a robotic system for duplicating shapes, a potential alternative approach to three-dimensional printing.

The Distributed Robotics Lab at MIT today detailed research aimed at replicating objects by essentially carving them from an unformed pile of "smart sand" or "robot pebbles." The vision is to have these miniature robots automatically create replicas of different sizes with only an original shape to work with.

A key difference from other approaches to replicating objects is that, unlike three-dimensional printing techniques, the smart sand builds by subtracting building blocks from a larger heap, according to … Read more

Is Hadoop the new tape?

I attended GigaOM's Structure:Data 2012 conference in New York City last week. This is the second one I've attended and I'm now a confirmed advocate of this event. Om Malik brings together people who, in one way or another, represent much the creative thinking around so-called big data. I got the feeling that I could strike up a conversation with anyone there and learn something new.

I noticed at least two major differences between the Structure:Data event I attended last year and this year's version. Last year, most if not all of the exhibiting … Read more

Adobe Elements on the Mac App Store: 5 implications

Adobe Systems and Apple may not see eye to eye over the Flash Player plug-in, but they've come to an understanding with the new app store era of software distribution.

Adobe announced today that both its consumer-oriented photo and video software, Photoshop Elements 10 and Premiere Elements 10, are now available on the Mac App Store. The move parallels what Adobe already has done with iOS apps and expands on its earlier sales only of Photoshop Elements 9 on the Mac App Store.

The Mac App Store, a standard feature of recent versions of Mac OS X, lets Apple … Read more

Address Book distribution list editor disabled by iCloud

After creating a group of contacts in Address Book, you can send e-mails to its members by simply typing the name of the group in the address field of an e-mail message, and Mail will fill in a list of the e-mail addresses of its members.

When Mail does this, by default the primary e-mail address for the contacts in the group will be used, so if a member has multiple e-mail addresses then the first one listed will be used. However, this default behavior can be changed by using Address Book's distribution list editor (available in the Edit … Read more