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By Megan Duke – Muskingum University

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Prime – a natural number great than 1 that has no positive divisors other than 1 and itself. Quadruplet – a grouping of 4

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a set of four prime numbers in the form {p, p+2, p+6, p+8} A representative of the closest possible grouping of four primes larger than 3

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The smallest prime quadruplet is {5, 7, 11, 13} followed by {11, 13, 17, 19} All prime quadruplets take the form {30n+11, 30n+13, 30n+17, 30n+19} with the exception of the first prime quadruplet. The first few values of n which give prime quadruples are n=0, 3, 6, 27, 49, 62, 69, …

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The width of a prime quadruplet is 8. Three consecutive odds cannot be a part of a prime quadruplet since can interval of seven or less cannot contain more than three odd numbers unless one of them is a multiple of three.

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Prime quadruplets that take the form {30n+11, 30n+13, 30n+17, 30n+19} are called prime decades. The terms in the prime decade all start with the same number.

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In 1982 a 45-digit prime quadruplet was discovered by M. A. Penk. In 1998, the prime quadruplet with more than 1000 digits was found at the end of an 8 day search on a computer that used 1400 MHz of Pentium computer power.

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There are also Prime Quintuplets keeping the same form {p, p+2, p+6, p+8} as the prime quadruplets with the addition of p-4 or p+12 and Prime Sextuplets which is when both p-4 and p+12 are prime with {p, p+2, p+6, p+8}

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Are there infinitely many prime quadruplets?

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http://www.jstor.org/discover/10.2307/3620774 ?uid=8366280&uid=3739840&uid=2&uid=3&ui d=67&uid=62&uid=3739256&uid=8366248&sid =21102911218451 http://www.jstor.org/discover/10.2307/3620774 ?uid=8366280&uid=3739840&uid=2&uid=3&ui d=67&uid=62&uid=3739256&uid=8366248&sid =21102911218451 http://www.javascripter.net/math/primes/qua druplets.htm http://www.javascripter.net/math/primes/qua druplets.htm http://mathworld.wolfram.com/PrimeQuadru plet.html http://mathworld.wolfram.com/PrimeQuadru plet.html http://en.wikipedia.org/wiki/Prime_quadruplet http://en.wikipedia.org/wiki/Prime_quadruplet

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Least Common Multiple Section 2.6.

Least Common Multiple Section 2.6.

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