+**155** is a natural [number](/wiki/Number) that follows 154 and precedes 156. As a [semiprime](/wiki/Semiprime), it is uniquely defined as the product of two distinct prime factors, 5 and 31.
+## See also
+- [Integer](/wiki/Integer)
+- [Prime Number](/wiki/Prime_Number)
+- [Composite Number](/wiki/Composite_Number)
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