Tags » Primes

2014 MacArthur "Genius" grant winner and the twin prime conjecture

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

Prime 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…

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Types of Numbers:

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


Some Strange Math Facts

Things we did not know

Ulam holding a strange device

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


Prove it!

The Activities

  1. Topic: Numbers: Book: Missing Math: A Number Mystery by Loreen Leedy.
  2. Topics: Spatial Reasoning and Drawing: I made a fairly simple 3-dimensional sculpture out of 
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Circle 1

The Andrica's Conjecture

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”.

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Zeiss Compact Primes Super Speed

Currently 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

Circular Primes (Problem 35)

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