Friday, September 18, 2009


1117 is a prime number.

1117 has a representation as a sum of two squares: 1117 = 212 + 262.

1117 is the hypotenuse of a primitive Pythagorean triple: 11172 = 2352 + 10922.

1117 is the smallest four-digit unholey prime: Such primes do not have holes in their digits.

1117 is the smallest four-digit prime comprised of two two-digit primes.

"One Thousand One Hundred Seventeen" is the smallest number whose English name is spelled with exactly thirty letters.

Number Gossip


Mr. Mealor said...

Wouldn't 1111 be the smallest four-digit prime to consist of two two-digit primes? I know I'm being picky, but the description doesn't specify two different two-digit primes.

Great site! I just found it today.

Unknown said...

1111 isn't a prime...