This number is a prime.

                                                    70 0112233445 5667788999

Just showing those entries submitted by 'Loungrides': (Click here to show all)

+ The only prime formed by inserting the ordered concatenation of all the pairs of identical digits, i.e., 00, 11, …, 99, between the digits of a double-digit prime p, i.e., p=79. [Loungrides]

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