131

This number is a prime.

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131 is the smallest prime fully auto-insertable (into all of its internal positions), one at a time. Accordingly, the following two integers are primes: 1'131'31, 13'131'1 [Rivera]

Submitted: 2020-06-01 06:51:12;   Last Modified: 2020-06-01 09:57:09.
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