664381

This number is a prime.

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Super-prime p₅₃₈₉₇ is equal to the sum of the first seven Mersenne and Thabit primes. Note that the sum of digits of its index is a power of 2. [Barnes]

Submitted: 2021-01-23 18:04:46; Last Modified: 2021-01-23 19:17:23.