semiprime is a natural number that is the product of exactly two prime numbers. The two primes in the product may equal each other, so the semiprimes...

mathematics, semiprime ideals and semiprime rings are generalizations of prime ideals and prime rings. In commutative algebra, semiprime ideals are also...

number following 3 and preceding 5. It is a square number, the smallest semiprime and composite number, and is considered unlucky in many East Asian cultures...

twenty-seventh distinct semiprime and the second of the form (7.q), where q is a higher prime. the aliquot sum of 91 is 21; itself a semiprime, within an aliquot...

and 29, making it a semiprime. 58 is not divisible by any square number other than 1, making it a square-free integer A semiprime that is not square numbers...

agrarian societies.) 10 is a composite number, the second squarefree semiprime, the fourth triangular number, and a happy number. 10 is the smallest...

the 4th centered nonagonal number. 55 is also the 19th semiprime and the 15th squarefree semiprime, as well as the 32nd nontotient number (including odd...

ideal. Primitive ideals are prime, and prime ideals are both primary and semiprime. An ideal P of a commutative ring R is prime if it has the following two...

preceding 35. 34 is the twelfth semiprime, with four divisors including 1 and itself. Specifically, 34 is the ninth distinct semiprime, it being the sixth of the...

triangular numbers, making it a tetrahedral number. 35 is the 10th discrete semiprime ( 5 × 7 {\displaystyle 5\times 7} ) and the first with 5 as the lowest...

semiprime ( 2 × 23 {\displaystyle 2\times 23} ) and the eighth of the form (2.q), where q is a higher prime, with an aliquot sum of 26; a semiprime,...

the radical of an ideal is called radicalization. A radical ideal (or semiprime ideal) is an ideal that is equal to its radical. The radical of a primary...

numbers (5 and 17), and is therefore a semiprime of the form (5.q) where q is prime. specifically, the 24th Semiprime, it being the fourth of the form (5...

thirtieth semiprime, and the twenty-sixth distinct semiprime and the eighth of the form (3.q). together with 85 and 86, forms the last semiprime in the 2nd...

Euler's totient function. 278 is the smallest semiprime number that has an anagram that is also semiprime. The other number is 287. List of highways numbered...

40. 39 is the 12th distinct semiprime and the 4th in the (3.q) family. It is the last member of the third distinct semiprime pair (38,39). 39 has an aliquot...

28th distinct semiprime and the 9th of the form (3.q) where q is a higher prime. the first number in the 3rd triplet of consecutive semiprimes, 93, 94, 95...

semiprime ( 2 × 31 {\displaystyle 2\times 31} ) and tenth of the form (2.q), where q is a higher prime. with an aliquot sum of 34; itself a semiprime...

number of prime factors. A composite number with two prime factors is a semiprime or 2-almost prime (the factors need not be distinct, hence squares of...

right annihilators of subsets of R. Goldie's theorem states that the semiprime right Goldie rings are precisely those that have a semisimple Artinian...

hardest instances of these problems (for currently known techniques) are semiprimes, the product of two prime numbers. When they are both large, for instance...

distinct semiprime and the 13th of the form (2.q). together with 85 and 87, forms the middle semiprime in the 2nd cluster of three consecutive semiprimes; the...

century AD, under the Gregorian calendar. Twenty-one is the fifth distinct semiprime, and the second of the form 3 × q {\displaystyle 3\times q} where q {\displaystyle...

integer requiring five syllables in English. 77 is: the 22nd discrete semiprime and the first of the (7.q) family, where q is a higher prime. with a prime...

a pronic number, a congruent number, a harmonic divisor number, and a semiprime. 6 is also the first Granville number, or S {\displaystyle {\mathcal {S}}}...

by a small number of cultures. Like the decimal base 10, the base is a semiprime, though it is unique as the product of the only two consecutive numbers...

number can be written as the sum of either two primes, or a prime and a semiprime (the product of two primes). It is a weakened form of Goldbach's conjecture...

natural number following 94 and preceding 96. 95 is: the 30th distinct semiprime and the fifth of the form (5.q). the third composite number in the 6-aliquot...

292. 291 is an odd composite number with two prime factors. 291 is a semiprime number meaning that it has 2 prime factors. 291 can be written as the...

natural number following 81 and preceding 83. 82 is: the twenty-seventh semiprime and the thirteenth of the form (2.q). with an aliquot sum of 44, within...