144648 = 861 × 168 = 492 × 294

185472 = 672 × 276 = 384 × 483

9949716 = 2583 × 3852 = 1476 × 6741

16746912 = 2556 × 6552 = 4473 × 3744

Every even number is the sum of two primes.

Is that true? No one knows. Originally proposed in 1742, it’s been tested as far as 10¹⁸, but the jury’s still out.

In the number 6210001000:

• The digit 0 occurs 6 times
• The digit 1 occurs 2 times
• The digit 2 occurs 1 time
• The digit 3 occurs 0 times
• The digit 4 occurs 0 times
• The digit 5 occurs 0 times
• The digit 6 occurs 1 time
• The digit 7 occurs 0 times
• The digit 8 occurs 0 times
• The digit 9 occurs 0 times

See also The Quick Brown Fox …

115132219018763992565095597973971522401 = 1³⁹ + 1³⁹ + 5³⁹ + 1³⁹ + 3³⁹ + 2³⁹ + 2³⁹ + 1³⁹ + 9³⁹ + 0³⁹ + 1³⁹ + 8³⁹ + 7³⁹ + 6³⁹ + 3³⁹ + 9³⁹ + 9³⁹ + 2³⁹ + 5³⁹ + 6³⁹ + 5³⁹ + 0³⁹ + 9³⁹ + 5³⁹ + 5³⁹ + 9³⁹ + 7³⁹ + 9³⁹ + 7³⁹ + 3³⁹ + 9³⁹ + 7³⁹ + 1³⁹ + 5³⁹ + 2³⁹ + 2³⁹ + 4³⁹ + 0³⁹ + 1³⁹

The international symbol for recycling depicts a Möbius strip.

In 1984, a pet kitten was given to Koko, the Stanford University gorilla who communicates through sign language.

She cared for it as a baby gorilla until December of that year, when the cat escaped from her cage and was run down by a car.

When her trainers told Koko what had happened, she gave the signs for two words.

They were “cry” and “sad.”

The statement “no statements are true unless they can be proven scientifically” cannot be proven scientifically.

31
331
3331
33331
333331
3333331
33333331

… are all prime, but 333333331 = 17 × 19607843.

a + b = c

4a – 3a + 4b – 3b = 4c – 3c

4a + 4b – 4c = 3a + 3b – 3c

4(a + b – c) = 3(a + b – c)

4 = 3