# jimmy green

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### FedEx employee discovers largest known prime number

A FedEx employee from Tennessee has made mathematical history with the discovery of the largest known prime number.<p>Quotes in the article<p>FedEx …

### FedEx Employee Discovers Largest Prime Number Ever at 23 Million Digits Long

Mathematicians are fascinated by prime numbers, those that can only be divided by themselves and the number 1. On Wednesday, it was announced that …

### Dive into the Mind-Boggling Math of Tessellating Pentagons

Children’s blocks lie scattered on the floor. You start playing with them—squares, rectangles, triangles and hexagons—moving them around, flipping …

### The Largest Prime Number to Date Has Been Discovered And It's Hurting Our Brains

Meet the 50th Mersenne prime.<p>A newly discovered prime number has broken the record for the largest ever found, coming in at a whopping 23,249,425 …

Mathematics### A Problem with Three Equilateral Triangles

Source<p>Solution<p>Extend $QR$ to $H$ on $AD,$ and, similarly, $PQ$ to $I.$<p>$\angle PQH=60^{\circ}=\angle PBH,$ making quadrilateral $BHPQ$ cyclic. …

### Can you solve it? Feast on these mathematical snacks

Three appetising picture puzzles<p>Merry Christmas guzzlers<p>Today’s three morsels are all geometrical:<p>1) What fraction of the whole triangle is the red triangle?<p>2) Four semicircles with radius 2 are constructed in the red square below. What is the area of the square?<p>3) A quarter of a circle with radius …

### Dr. Minhyong Kim, Oxford University - his whiteboard, close-up

Mathematics is full of weird number systems that most people have never heard of and would have trouble even conceptualizing. But rational numbers …

### If you can solve one of these 6 major math problems, you'll win a $1 million prize

In 2000, the Clay Mathematics Institute announced the Millennium Prize problems. These were a collection of seven of the most important math problems that remain unsolved.<p>Reflecting the importance of the problems, the Institute offered a $1 million prize to anyone who could provide a rigorous, …

Mathematics### What zero-knowledge proofs will do for blockchain

Zero-knowledge (ZK) proofs are generating excitement in financial circles lately due to their potential for increasing privacy and security for blockchain participants. The concept itself is not new, as cryptographers have been working with zero-knowledge/interactive proofs for years. But the …

Blockchain### Complex numbers: Why do we love them?

Imagine you are minding your own business, solving some equations at school or work. You start with , and pretty quickly realise this this equation …

Mathematics### Ambiguity and Nuance — Even in Mathematics

Ambiguity and Nuance — Even in Mathematics<p>Mathematics is often seen as the epitome of a study of hard facts: answers are either right or wrong, …

### An inverse theorem for an inequality of Kneser

I have just uploaded to the arXiv the paper “An inverse theorem for an inequality of Kneser“, submitted to a special issue of the Proceedings of the …

Mathematics### Jeff Bezos teaches his kids math with a strategy that's made Chinese and Singaporean students the best in the world — but it's unusual in the US

Jeff Bezos, the Amazon CEO and richest person in the world, has amassed his wealth by being creative and trying unorthodox ways of solving problems.<p>It seems he and his wife, MacKenzie Bezos, use the same approach for their children's education.<p>"We tried all sorts of things ... Mandarin lessons, the …

Mathematics### Quiz 8th-Graders With These Math Word Problems

Solving math problems can intimidate eighth-graders: It shouldn't. Explain to students that you can use basic algebra and simple geometric formulas …

### How Do You Prepare Your Kids For Entrepreneurship? Teach Them These 5 Lessons

Kids can start learning about entrepreneurship younger than you think.<p>It's hard for me to say if I would be the entrepreneur I am today, had I not tried my hand at selling cookies door to door when I was 4 years old, or held the responsibility of running the neighborhood paper route.<p>In fact, my …

Kids### Here Are Some Coin Games to Use That Teach Kids About Money

Coins are a great way not only to teach children about the value of money, but also to teach a number of valuable mathematical concepts, including …

Kids### Pythagorean Triple

A Pythagorean triple is a triple of positive integers , , and such that a right triangle exists with legs and hypotenuse . By the Pythagorean …

Mathematics### Math Class Doesn’t Work. Here’s the Solution

I love math, but I know that I’m unusual. Math anxiety is a rampant problem across the country. Researchers now know that when people with math …

### Applying probability to non-random things

Probability has surprising uses, including applications to things that absolutely are not random. I’ve touched on this a few times. For example, I’ve …

Mathematics### Even teachers now say that academics are not the key to kids’ success

To many, increasing automation and the unprecedented pace of technological changes mean kids need more than just academic skills to succeed. They need confidence and motivation to tackle problems, interpersonal skills to work with others and the resilience to stay on task when things fall apart.<p>New …

Pedagogy### Mathematicians Measure Infinities and Find They’re Equal

Two mathematicians have proved that two different infinities are equal in size, settling a long-standing question. Their proof rests on a surprising …

Mathematics### These four easy steps can make you a math whiz

Many people find mathematics daunting. If true, this piece is for you. If not, this piece is still for you.<p>What do you think of when you think about …

Mathematics### GSAS: 8434

Teaching The Fundamentental Theorem<p>On February 2, (remember groundhog day when we treated the wobbly table theorem?), an interesting article appeared …

### Programming language from scratch: 3 easy steps to an interpreter

A little while ago I wrote about 16bitjs, a 16 bit virtual machine written in javascript. It implemented a custom CPU architecture and assembly …

### Statistics: P values are just the tip of the iceberg

Ridding science of shoddy statistics will require scrutiny of every step, not merely the last one, say Jeffrey T. Leek and Roger D. Peng.<p>Subject …

### Death of a Genius

Maryam Mirzakhani, the only woman to win the Fields Medal (the equivalent of the Nobel Prize in mathematics) died on July 14th, aged 40. Her career …

Mathematics### 20 Cool Command Line Tricks for Windows and macOS

The command line (or Terminal for you Mac fans) is a throwback to a simpler age of computing, before mouse pointers and application windows and …

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