139
(another Prime Pages' Curiosity)
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+ 139 and 149 are the first consecutive primes differing by 10. [Wells]

+ 3139 + 2 is prime.

+ Stirling's formula in terms of the gamma function contains the prime number 139.

+ 139 divides the sum of the first 139 composite numbers. [Honaker]

+ The first prime which has the same end-digit as its consecutive prime. [Silva]

+ The largest prime factor among the smallest pair of odd amicable numbers.

+ The smallest prime that contains one prime digit, one composite digit, and one digit that is neither prime nor composite. [Brown]

+ The smallest prime factor of the smallest multidigit composite Lucas number with a prime index.

+ The number of chromatically unique simple graphs on seven nodes. [Post]

+ STB 139 is the cryptic name for a nightspot located in the Rippongi district of Tokyo, Japan.

+ In 1975, Pomerance showed that the second largest prime factor of an odd perfect number should be at least 139.

+ 139 = 9*8+7*6+5*4+3*2-1. [Silva]

+ The smallest prime formed by concatenating all divisors of a composite number. [Silva]

+ The binary expansion 10001011 of 139 is a de Bruijn sequence of order 3 on 2 digits. [Poo Sung]

+ The largest prime, less than a googol, formed by concatenating in ascending order the first n powers of 3 (n=3). Note that for n=2 we take the smallest such prime (emirp). [Loungrides]

+ The largest number of states that a six-piece Burr Puzzle could have without coming apart. [Cutler]




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