22427...41183 (47-digits)

This number is a prime.

2242745 2848394140 2769470443 9799166361 1794141183

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Smallest odd prime factor of (((((((((4^2-2)^2-2)^2-2)^2-2)^2-2)^2-2)^2-2)^2-2)^2-2)^2-2, a 586-digit Lucas-Lehmer number whose factorization will provide the first unknown term in OEIS A177892. [Mathar]

Submitted: 2023-09-26 00:35:14; Last Modified: 2023-09-27 02:02:06.