161409881
This number is a prime.
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The sum of the first primes of form 4k+1, from 5 to 161409881, is a perfect square: 5 + ... + 161409881 = 354203842652416 = 18820304^2. [Rivera]
Submitted: 2020-06-01 22:01:05; Last Modified: 2020-06-01 22:16:54.
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