Editing Semiprime (section)

==Examples and variations==
The semiprimes less than 100 are:
{{bi|left=1.6|4, 6, 9, 10, 14, 15, 21, 22, 25, 26, 33, 34, 35, 38, 39, 46, 49, 51, 55, 57, 58, 62, 65, 69, 74, 77, 82, 85, 86, 87, 91, 93, 94, and 95 {{OEIS|A001358}}}}
Semiprimes that are not square numbers are called discrete, distinct, or squarefree semiprimes:
{{bi|left=1.6|6, 10, 14, 15, 21, 22, 26, 33, 34, 35, 38, 39, 46, 51, 55, 57, 58, 62, 65, 69, 74, 77, 82, 85, 86, 87, 91, 93, 94, 95, ... {{OEIS|A006881}}}}

The semiprimes are the case <math>k=2</math> of the <math>k</math>-[[almost prime]]s, numbers with exactly <math>k</math> prime factors. However some sources use "semiprime" to refer to a larger set of numbers, the numbers with at most two prime factors (including unit (1), primes, and semiprimes).<ref>{{cite book|title=Professor Stewart's Cabinet of Mathematical Curiosities|first=Ian|last=Stewart|publisher=Profile Books|year=2010|isbn=9781847651280|page=154|url=https://books.google.com/books?id=Y0Jggtb7DB0C&pg=PA154}}</ref> These are:
{{bi|left=1.6|1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 13, 14, 15, 17, 19, 21, 22, 23, 25, 26, 29, 31, 33, 34, 35, 37, 38, 39, 41, 43, 46, 47, 49, ... {{OEIS|A037143}}}}