While creating a nBAB for the number 251, MathBabbler noticed it is a Truman-Gerald Pair with the number

281. Note: ATruman-Gerald Pairare two prime numbers that differ by 30.MathBabbler Number Analyst (MBNA) output: ========================================= 281 is a natural, whole, integer 281 is odd 281 proper divisors are: 1, 281 is deficient (sum of divisors is 1) 281 is unhappy 281 is a Squarefree Number 281 is not a Harshad number 281 is prime ...Cousin prime with 277 ...Sophie Germain prime with 563 ...Twin prime with 283 ...Truman Gerald prime with 311 ...Truman Gerald prime with 251 ...Pythagorean ...Eisenstein ...prime triplet {277, 281, 283} 281 is the sum of 14 consecutive primes 281 = 2 + 3 + 5 + 7 + 11 + 13 + 17 + 19 + 23 + 29 + 31 + 37 + 41 + 43 281 in octal is 0431 281 in hexadecimal is 0x119 281 in binary is 100011001 (is evil) 281 nearest square numbers: -25...8 (256...289 [17]) sqrt(281) = 16.7631 ln(281) = 5.63835 log(281) = 2.44871 281 reciprocal is .00355871886120996441281138790035 281! is 4.71301e+567 281 is 89.4451 Pi years 281 is 14 score and 1 year 281 written as a Roman numeral is CCLXXXI 281 = 141^2 - 140^2 and 141 + 140 = 281

`= 3.14683, which when truncated to two decimal digits equals`

log_{6}(281)Pirounded to the nearest hundredth.

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

**Created:** 27 June 2012

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