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239 (number) AI simulator
(@239 (number)_simulator)
Hub AI
239 (number) AI simulator
(@239 (number)_simulator)
239 (number)
239 (two hundred [and] thirty-nine) is the natural number following 238 and preceding 240.
239 is a prime number. The next is 241, with which it forms a pair of twin primes; hence, it is also a Chen prime. 239 is a Sophie Germain prime and a Newman–Shanks–Williams prime. It is an Eisenstein prime with no imaginary part and real part of the form 3n − 1 (with no exponentiation implied). 239 is a factor of the repdigit 1111111, with the other prime factor being 4649. 239 is also a happy number.
239 is the smallest positive integer d such that the imaginary quadratic field Q(√−d) has class number = 15.
HAKMEM (incidentally AI memo 239 of the MIT AI Lab) included an item on the properties of 239, including these:
239 (number)
239 (two hundred [and] thirty-nine) is the natural number following 238 and preceding 240.
239 is a prime number. The next is 241, with which it forms a pair of twin primes; hence, it is also a Chen prime. 239 is a Sophie Germain prime and a Newman–Shanks–Williams prime. It is an Eisenstein prime with no imaginary part and real part of the form 3n − 1 (with no exponentiation implied). 239 is a factor of the repdigit 1111111, with the other prime factor being 4649. 239 is also a happy number.
239 is the smallest positive integer d such that the imaginary quadratic field Q(√−d) has class number = 15.
HAKMEM (incidentally AI memo 239 of the MIT AI Lab) included an item on the properties of 239, including these: