The number

`was the smallest number that didn't have a nBAB on 28 April 2016. After this nBAB for`

311`was posted, the number 312 was the smallest number without a nBAB.`

311MathBabbler Number Analyst (MBNA) output: ========================================= 311 is a natural, whole, integer 311 is odd 311 proper divisors are: 1, 311 has 1 proper divisors 311 is deficient (sum of divisors is 1; ratio: 0.00321543) 311 is unhappy 311 is a Squarefree Number 311 is prime (not composite) ...Cousin prime with 307 ...Sexy prime with 317 ...Sexy Quadruple prime with 299, 305, 317 ...Twin prime with 313 ...Truman Gerald prime with 281 ...OEIS:002145 (4n+3; n=77) ...reversible prime with 113 ...Left-truncatable ...Right-truncatable ...Eisenstein ...prime triplet {307, 311, 313} ...prime triplet {311, 313, 317} 311 is Arithmetic (A003601) 311 is the sum of 11 consecutive primes 311 = 11 + 13 + 17 + 19 + 23 + 29 + 31 + 37 + 41 + 43 + 47 311 in octal is 0467 311 in hexadecimal is 0x137 311 in binary is 100110111 (is evil) 311 nearest square numbers: -22...13 (289...324 [18]) sqrt(311) = 17.6352 ln(311) = 5.73979 log(311) = 2.49276 311 reciprocal is .00321543408360128617363344051446 311! is 6.73726e+641 311 is 98.9944 Pi years 311 is 15 score and 11 years 311 written as a Roman numeral is CCCXI 311 is 156^2 - 155^2 and 156 + 155 = 311 311 is a multiple of 1 & it contains a 1 (A011531)

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

**Created:** 28 April 2016

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