5399
This number is a prime.
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5399 is the smallest 4-digit prime number of the form 8k-1, such that 4k-1, 16k-1, and 32k-1 are also primes. [Pace]
Submitted: 2025-10-21 16:22:05; Last Modified: 2026-01-19 15:37:18.
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