1181

This number is a prime.

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The sum of first 11 primes ending with 1 is an invertible emirp beginning with 11, (the smallest strobogrammatic prime), i.e., 11+31+41+61+71+101+131+151+181+191+211=1181. [Loungrides]

Submitted: 2015-09-22 18:23:28; Last Modified: 2018-02-22 11:18:55.