From http://www.macfound.org/fellows/927/:

125 more wordsPrime numbers have inspired great intrigue over the last centuries, and one of the most basic unanswered questions has been the spacing between two consecutive prime numbers, or the…

From http://www.macfound.org/fellows/927/:

125 more wordsPrime numbers have inspired great intrigue over the last centuries, and one of the most basic unanswered questions has been the spacing between two consecutive prime numbers, or the…

**Types of Numbers:**

Natural Numbers:

The set of numbers we count with 1, 2, 3, 4, 5, 6, 7, 8… etc. Another name for them in fact is the counting numbers. 327 more words

* Things we did not know *

Stanislaw Ulam was a Polish-American mathematician whose work spanned many areas of both continuous and discrete mathematics. 1,454 more words

**Topic: Numbers:**Book: Missing Math: A Number Mystery by Loreen Leedy.**Topics: Spatial Reasoning and Drawing:**I made a fairly simple 3-dimensional sculpture out of 956 more words

Things should be as simple as possible, but not simpler (Albert Einstein)

Following with conjectures about primes, it is time for Andrica’s conjecture. The great mathematician Leonhard Euler (1707-1783) pointed: “Mathematicians have tried with no success to find some kind of order in the sequence of prime numbers and today we have reasons to believe that this is a mystery that human mind will never understand”.

305 more wordsCurrently available:

- 15mm T2.9
- 21mm T2.9
- 28mm T2.1
- 35mm T1.5 Super Speed
- 50mm T1.5 Super Speed
- 85mm T1.5 Super Speed
- 100mm T2.1
- 135mm T2.1

We will mix and match any way you want – with a special price just for the Super Speed lenses. 14 more words

The number, 197, is called a circular prime because all rotations of the digits: 197, 971, and 719, are themselves prime.

There are thirteen such primes below 100: 2, 3, 5, 7, 11, 13, 17, 31, 37, 71, 73, 79, and 97. 413 more words