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A composite number with two prime factors is a semiprime or 2-almost prime (the factors need not be distinct, hence squares of primes are included). A composite number with three distinct prime factors is a sphenic number. In some applications, it is necessary to differentiate between composite numbers with an odd number of distinct prime ...
299 is an odd composite number with two prime factors. [1] 299 is a highly cototient number, meaning that it has more values for x-phi(x)= that number than any before it. [2] 299 is a self number, meaning that it has 298 integer partitions. [3] 299 is the twelfth cake number, the maximum number of pieces to get from 12 slices of a cake. [4]
279 is an odd composite number with two prime factors. [1] Waring’s Conjecture is g(n)=2n+⌊(3/2)n⌋-2. When 8 is plugged in for n, the result is 279. That means that any positive integer can be formed with at most 279 numbers to the 8th power. [2] 279 is the smallest number whose product of digits is 7 times the sum of its digits.
275 is an odd composite number with 2 prime factors. [1] 275 is equivalent to the number of partitions of 28 when no partition occurs only once. Partitions are the number of ways of writing a number as a sum of other positive integers. [2] 275 is the sum of fifth powers of the first two primes (2^5 + 3^5 = 275).
301 is an odd composite number with two prime factors. [1] 301 is a Stirling number of the second kind represented by {7/3} meaning that it is the number of ways to organize 7 objects into 3 non-empty sets. [2] 301 is the sum of consecutive primes 97, 101, and 103.
265 is an odd composite number with two prime factors. [1] 265's sum of its proper divisors is 59. [2] 265 is the number of derangements possible with 6 digits. That means that it is equivalent to !6. [3] The number 265 is associated with the geometric shape known as the Vesica Piscis.
291 is an odd composite number with two prime factors. [1] 291 is a semiprime number meaning that it has 2 prime factors. [2] 291 can be written as the sum of the nth prime plus n. It is the 52nd prime (239) plus 52. [3] 291 is one of the positions of “c” in the tribonacci word abacabaab… defined by a->ab, b->ac, c->a. [4] 291 is the sum ...
305 is an odd composite number with two prime factors. [1] 305 is the convolution of the first 7 primes with themselves. [2] 305 is the fifth hexagonal prism number which is defined by (n+1)(3n 2 +3n+1). [3] 305 is the hypotenuse of two Pythagorean triples. 305 2 =207 2 +224 2 =136 2 +273 2. [4] [5]