353

This number is a prime.

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Start of the first set of 4 prime-index primes in arithmetic progression, i.e., (353 = prime(prime(20)), 431 = prime(prime(23)), 509 = prime(prime(25)), 587 = prime(prime(28)). [Jacobs]

Submitted: 2012-07-01 17:04:19; Last Modified: 2016-08-05 12:01:44.