205081
This number is a prime.
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(7, 11, 13, 17, 19, 23) is the only set of six consecutive primes p, pi < 100, such that the average of every two consecutive 4th powers of them is prime. The largest such average is 205081 = (19^4+23^4)/2. [Loungrides]
Submitted: 2019-02-03 12:41:12; Last Modified: 2020-02-12 12:29:29.
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