57881
This number is a prime.
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57881 is the largest 5-digit prime number which is
simultaneously a Sophie Germain prime, a happy prime, and a
prime generated by the Euler's polynomial n^2 + n + 41. [Pace]
Submitted: 2025-11-04 17:25:05; Last Modified: 2026-02-14 18:42:57.
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