2423
This number is a prime.
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(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]
Submitted: 2011-06-13 10:06:13; Last Modified: 2018-03-10 18:44:44.
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