Homework

http://www.sxc.hu/photo/648069

It’s been known since 1876 that 267-1 isn’t prime, but for decades no one knew what the factors were.

Then, at a meeting in 1903, mathematician Frank Nelson Cole gave an hourlong “lecture” in which he didn’t say a word. On one chalkboard he expanded the value of 267-1:

147,573,952,589,676,412,927

On another he wrote:

193,707,721 × 761,838,257,287

Then he multiplied those values by hand. The two boards matched. He had found the factors. Cole returned to his seat amid a standing ovation.

He later admitted that finding the factors had taken “three years of Sundays.”

| Science & Math

Easy as Pi

Isaac Asimov proposed this mnemonic for a famous constant:

How I want a drink, alcoholic, of course, after the heavy lectures involving quantum mechanics!

Count the letters in each word and you’ll get 3.14159265358979.

| Language · Science & Math

Concentrated Yuck

http://commons.wikimedia.org/wiki/File:Denatonium_chemical_structure.png
Image: Wikimedia Commons

The bitterest thing in the world is denatonium, a compound discovered by Scottish researchers in 1958. Most people find its taste unbearable even in dilutions of 10 parts per million.

A New York chemist once went home with a trace of denatonium saccharide on his lip. He kissed his wife and she almost threw up.

| Science & Math

The Eye of Sauron

http://commons.wikimedia.org/wiki/File:Fomalhaut_with_Disk_Ring_and_extrasolar_planet_b.jpg

The Eye was rimmed with fire, but was itself glazed, yellow as a cat’s, watchful and intent, and the black slit of its pupil opened on a pit, a window into nothing.

That’s a quote from The Fellowship of the Ring, but this image is actually a star. Fomalhaut, 25 light-years away, is one of the brightest stars in the night sky.

Draw your own conclusions.

| Literature · Science & Math

DCLXVI

http://commons.wikimedia.org/wiki/File:Sainte_Chapelle_01.JPG
Image: Wikimedia Commons

Hexakosioihexekontahexaphobia is fear of the number 666, which is linked to Satan and the Antichrist in the Book of Revelation.

Unfortunately, it’s rather hard to avoid. 666 is the sum of the squares of the first seven primes:

666 = 22 + 32 + 52 + 72 + 112 + 132 + 172

Also:

666 = 1 + 2 + 3 + 4 + 567 + 89

= 123 + 456 + 78 + 9

= 9 + 87 + 6 + 543 + 21

= 13 + 23 + 33 + 43 + 53 + 63 + 53 + 43 + 33 + 23 + 13

In 1989, after his second term as president, Ronald and Nancy Reagan moved to a new home in the Bel-Air section of Los Angeles. They had the address, 666 St. Cloud Road, changed to 668 St. Cloud Road.

| Religion · Science & Math