This number is a prime.

                                                        678798899 9657777797

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The start of the record prime gap from 6787988999657777797 to 6787988999657779307, and it only uses the digits from 5 to 9. This is the 77th record prime gap, and it contains the substring 77777. [Jacobs]

Submitted: 2018-03-27 16:45:59;   Last Modified: 2018-03-27 17:31:33.
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