Many number puzzles involve prime numbers. Understanding the distribution of prime numbers is hence an important part of understanding the number system. A prime number is a number evenly divisible only by itself and by one. Seventeen is a prime...

A prime number is a number that has just two factors (divisors): itself and the number 1. For example, 7 is prime, since its only divisors are 7 and 1. The number 6 is not prime, since it is divisible by 2 and 3. Numbers that have more than two...

A prime number is a positive integer greater than 1 for which the only divisors are 1 and the number itself. For example, 17 is a prime number because the only divisors of 17 are 1 and 17, while 18 is not prime because 2, 3, 6, and 9 all divide 18 in...

The top rating of creditworthiness of COMMERCIAL PAPER made by Moody’s Investors Service. See also:...

In mathematics, a prime number (or a prime) is a natural number which has exactly two distinct natural number divisors: 1 and itself. An infinitude of prime numbers exists, as demonstrated by Euclid in about 300 BC. The first thirty prime numbers...

Go figure 37,258: The number of cyber-attacks on government and private networks last year, up from 4,095 in 2005. The increase can be attributed in part to an increased awareness of the problem. Source: Homeland Security Department 42%: The percentage...

Top 30 Cable Networks Most of the top cable networks continue to increase their distribution, posting gains of 5% or more, mirroring the growth in the number of basic cable and digital broadcast satellite customers. With a 5.8% gain, ESPN leapfrogged from...

The lesson plan was called "Artificial Unintelligence," but it was written more like a comic book than a syllabus for a serious computer science class."Singing, dancing and drawing polygons may be nifty, but any self-respecting evil roboticist needs a few more tricks in the repertoire...

What is a bull trap? It's a stock that looks great and has everything going for it -- but is actually poised for a major fall. Late-stage bases usually are such a trap. By the time a stock makes a fourth base, it already has...