111211
This number is a prime.
The first prime (emirp) of form aba, where a, b are successive double-digit numbers. [Loungrides]
The first prime formed by inserting a composite number
between two double-digit identical adjacent primes is an
emirp. [Loungrides]
The largest near repunit prime in the first 1000 digits of
Golden Ratio. It starts at position 644 after the decimal
point. [Gupta]
(There is one curio for this number that has not yet been approved by an editor.)
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