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Largest known prime number discovered; has 17,425,170 digits Feb 14th 2013, 03:54 On Jan. 25, the largest known prime number, 257,885,161-1, was discovered on Great Internet Mersenne Prime Search (GIMPS) volunteer Curtis Cooper's computer. The new prime number, 2 multiplied by itself 57,885,161 times, less one, has 17,425,170 digits. With 360,000 CPUs peaking at 150 trillion calculations per second, 17th-year GIMPS is the longest continuously-running global "grassroots supercomputing" project in Internet history. Engineers show feasibility of superfast materials: 'Organic topological insulators' for quantum computing Feb 13th 2013, 18:24 Engineers demonstrated it is feasible to build the first organic materials that conduct electricity on their edges, but act as an insulator inside. These materials, called organic topological insulators, could shuttle information at the speed of light in quantum computers and other high-speed electronic devices. A cooler way to protect silicon surfaces Feb 13th 2013, 18:24 Researchers have found a way to passivate silicon at room temperature, which could be a significant boon to solar-cell production and other silicon-based technologies. Simulation helps scientists better understand the origin of our solar system Feb 13th 2013, 18:20 Simulations boost the significance of image and measurement data from space missions: based on the example of an asteroid. Astrophysicists show collisions with other celestial bodies can be reconstructed and that even the internal structure of so-called protoplanets can be described. These models help to understand the development of our solar system.

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