This number is a prime.

                                                                6 6132153133

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66132153133 is prime and the start of a run of four more primes obtained by the following transformation rule for each digit: d -> d digits d. The fifth such prime has 3560 digits. By Giovanni Resta. [Rivera]

Submitted: 2020-06-23 10:53:38;   Last Modified: 2020-06-23 11:09:18.
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