Tags » Primes

Duclos Lenses Acquires UniqOptics' Assets

The title pretty much says it all… But here’s the press release from Duclos Lenses, Inc.


September 22nd, 2014

Chatsworth, California… 197 more words


*** Transformers Diablock: Optimus Primes Convoy Figure cheap

Transformers Diablock: Optimus Primes Convoy Figure

Transformers Diablock: Optimus Primes Convoy Figure. If you looking for Transformers Diablock: Optimus Primes Convoy Figure. For more details of Transformers Diablock: Optimus Primes Convoy Figure, please follow the link below. 56 more words

Crazy constructible polygons

Read on Prof Ian Stewart’s Twitter (@JoatStewart):

“Regular 618046320536701272583608037733434096317263320037227965361869850786715388113584129-gon is constructible with ruler compass & trisector

So is 756760676272923020551154471073240459834492063891235892290277703256956240171581788957704193-gon. 90-digit prime!

However, regular 11-gon is not constructible with ruler, compass, and angle-trisector.

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Fun (Maths NSFW)

The definition of a prime number

The standard definition of a prime number is an integer greater than 1 which is only divisible by itself and 1. While this definition is the simplest to state and often the easiest to work with, it’s not very… 588 more words


The harmonic series

The harmonic series is the expression

whose value is an infinite sum. Since the terms in the series become arbitrarily small as one goes further in (since for every positive real number and every positive integer greater than , the th term is smaller than ), one might expect the series to converge a finite value, but this is not the case—its value is actually infinite. 1,160 more words


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