The book is now available! 2423
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

+ 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]

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