semiprime


semiprime
A natural number that is the product of two prime numbers.

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  • Semiprime — In mathematics, a semiprime (also called biprime or 2 almost prime, or pq number) is a natural number that is the product of two (not necessarily distinct) prime numbers. The first few semiprimes are 4, 6, 9, 10, 14, 15, 21, 22, 25, 26, ...… …   Wikipedia

  • Semiprime ring — In mathematics, a ring R is a semiprime ring if its zero ideal is the intersection of all its prime ideals.External links* [http://planetmath.org/encyclopedia/SemiprimeIdeal.html PlanetMath article on semiprime ideals] …   Wikipedia

  • 14 (number) — ← 13 15 → 14 ← 10 11 12 13 14 15 16 …   Wikipedia

  • 15 (number) — This article is about the number 15. For the year, see 15. For other uses, see 15 (disambiguation). ← 14 16 → 15 ← …   Wikipedia

  • Ideal (ring theory) — In ring theory, a branch of abstract algebra, an ideal is a special subset of a ring. The ideal concept allows the generalization in an appropriate way of some important properties of integers like even number or multiple of 3 . For instance, in… …   Wikipedia

  • 21 (number) — For other uses, see 21 (disambiguation). ← 20 22 → 21 ← 20 21 22 …   Wikipedia

  • 33 (number) — ← 32 34 → 33 ← 30 31 32 33 34 35 36 …   Wikipedia

  • 22 (number) — This article is about the number. For other uses, see 22 (disambiguation). ← 21 23 → 22 ← 20 21 22 …   Wikipedia

  • 38 (number) — This article discusses the number thirty eight. For the year 38 CE, see 38. For other uses of 38, see 38 (disambiguation) ← 37 39 → 38 ← …   Wikipedia

  • 46 (number) — ← 45 47 → 46 ← 40 41 42 43 44 45 46 …   Wikipedia