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Lucky number. In number theory, a lucky number is a natural number in a set which is generated by a certain "sieve". This sieve is similar to the sieve of Eratosthenes that generates the primes, but it eliminates numbers based on their position in the remaining set, instead of their value (or position in the initial set of natural numbers). [1]
Chinese numerology. Some numbers are believed by some to be auspicious or lucky (吉利, pinyin: jílì; Cantonese Yale: gātleih) or inauspicious or unlucky (不吉, pinyin: bùjí; Cantonese Yale: bātgāt) based on the Chinese word that the number sounds similar to. The numbers 6 and 8 are widely considered to be lucky, while 4 is considered ...
888 3 = 700227072 is the smallest cube in which each digit occurs exactly three ... numbers containing the digit sequence 888 are considered particularly lucky, and ...
Numerology (known before the 20th century as arithmancy) is the belief in an occult, divine or mystical relationship between a number and one or more coinciding events. It is also the study of the numerical value, via an alphanumeric system, of the letters in words and names. When numerology is applied to a person's name, it is a form of onomancy.
A cluster prime is a prime p such that every even natural number k ≤ p − 3 is the difference of two primes not exceeding p. 3, 5, 7, 11, 13, 17, 19, 23, ... (OEIS: A038134) All odd primes between 3 and 89, inclusive, are cluster primes. The first 10 primes that are not cluster primes are: 2, 97, 127, 149, 191, 211, 223, 227, 229, 251.
In mathematics. 777 is an odd, composite, palindromic [1] repdigit. [2] It is also a sphenic number, [3] an extravagant number, [4] a lucky number, [5] a polite number, [6] an amenable number, and a deficient number. 777 is a congruent number, [7] as it is possible to make a right triangle with a rational number of sides whose area is 777. [8]
Leonhard Euler published the polynomial k2 − k + 41 which produces prime numbers for all integer values of k from 1 to 40. Only 6 lucky numbers of Euler exist, namely 2, 3, 5, 11, 17 and 41 (sequence A014556 in the OEIS). [1] Note that these numbers are all prime numbers. The primes of the form k2 − k + 41 are.
Eight (八; accounting 捌; pinyin bā) is considered a lucky number in Chinese culture because it sounds like the word meaning to generate wealth (發 (T) 发 (S); Pinyin: fā). Property with the number 8 may be valued greatly by Chinese. For example, a Hong Kong number plate with the number 8 was sold for $640,000. [66]