On 14 September 2013 somebody tweeted about 14 September 1752 and how that was the start of the Gregroian calendar. They also mentioned that 14 September 2013 (which I proclaim is Square-Root September Pi Day) was also the

257th day of the year and that257was a Fermat Number.Fermat Numbers are defined by the following function.

F(n) = 2^(2^n) + 1, n ≥ 0The MBNA was not checking for Fermat numbers when this nBAB was created on 15 September 2013.

MathBabbler Number Analyst (MBNA) output: ========================================= 257 is a natural, whole, integer 257 is odd 257 proper divisors are: 1, 257 is deficient (sum of divisors is 1) 257 is unhappy 257 is a Squarefree Number 257 is not a Harshad number 257 is prime ...Sexy prime with 263 ...Sexy Triplet prime with 263, 269 ...Sexy prime with 251 ...Truman Gerald prime with 227 ...Pythagorean ...Eisenstein 257 in octal is 0401 257 in hexadecimal is 0x101 257 in binary is 100000001 (is evil) 257 nearest square numbers: -1...32 (256...289 [17]) sqrt(257) = 16.0312 ln(257) = 5.54908 log(257) = 2.40993 257 reciprocal is .00389105058365758754863813229571 257! is 2.20459e+509 257 is 81.8056 Pi years 257 is 12 score and 17 years 257 written as a Roman numeral is CCLVII 257 = 129^2 - 128^2 and 129 + 128 = 257## Update::2015.02.22

MathBabbler watched an episode of

Bob Burgerson 21 February 2015 during which he heard frequent mention of the number257.

`tweeted the following on`

@BobsBurgersFOX`2014.12.14`

."Troop257? They're the roughest troop in town. I heard they hold hot dogs in the fire with their bare hands" - Tina #bobsburgers

**Creator:** Gerald Thurman
[gthurman@gmail.com]

**Created:** 15 September 2013

This work is licensed under a Creative Commons Attribution 3.0 United States License.