12011...11237 (28-digits)

This number is a prime.

                                              12011213 1217122312 2912311237

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1201121312171223122912311237 is the smallest 28-digit prime (which happens to an emirp) formed with seven consecutive increasing four-digit primes. Note that 28 is a perfect number. [Mortreuil]

Submitted: 2004-07-23 08:44:43;   Last Modified: 2008-01-30 11:28:00.
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