9139397

This number is a prime.

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The largest left-truncatable emirp consisting of only odd digits, i.e., 9139397, 139397, 39397, 9397, 397, 97, 7 are all primes. [Loungrides]

Submitted: 2019-06-05 05:38:40; Last Modified: 2019-06-05 11:57:38.