611111

This number is a prime.

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The largest prime formed from the difference m m's minus n n's, where m, n are successive digits, i.e., 666666-55555. Note that there are other two such prime differences, i.e., 4444-333=4111 and 333-22=311 (emirp). [Loungrides]

Submitted: 2013-10-05 06:15:30;   Last Modified: 2020-05-12 11:06:28.
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