This number is a prime.

+ The 2423 Hillside Observation Passenger Car is part of the Lionel Lines set of the early to mid 1950's.

+ (24, 23, 22, 21) is the monadic case of four consecutive double-digit numbers such that concatenating them two-two in descending order, we create two primes, i.e., 2423 and 2221. [Loungrides]

+ 2423 is the largest in a list consecutive distinct primes of the form (671n mod2454)+(304n mod32)+(4373n mod199), where n=1 to 38. Found by Dmitry Kamenetsky. See PP&P Connection.

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