plural of proton number

(law) a number that represents information which is illegal to possess, utter or propagate. Any information that can be represented in binary format is, ipso facto, representable as a number, and therefore if the information itself is illegal in some way, the pure number itself may be called illegal.

An ordinal number that distinguishes a monarch from others of the same name.

plural of regnal number

(logic) A number uniquely assigned to each symbol, and to each well-formed formula of some formal language.

plural of complex number

plural of PIN number

(number theory) Any number of the form k·2ⁿ + 1, where k is odd, n is a positive integer, and 2ⁿ > k.

(mathematics) Any of a set of numbers which extends the set of real numbers by including infinitesimals and infinities, and is used in nonstandard analysis.

plural of serial number