2111511013
This number is a prime.
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The smallest prime formed from a single-digit, a double-digit, a 3-digit and a 4-digit primes, so that deleting from the right each time the last of them always remains a prime, i.e., 211151, 211, 2 are primes. [Loungrides]
Submitted: 2016-12-13 17:05:17; Last Modified: 2018-12-25 19:32:13.
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