1686910196861
This number is a prime.
168 6910196861
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The smallest palindromic Cyclops prime that is 'brilliant' when turned upside down. Brilliant numbers are numbers with two prime factors of the same length, e.g., 1989610169891 = 1291159 × 1540949. The sequence begins 1686910196861, 1996190916991, 186116909611681, ... . [Gaydos]
Submitted: 2022-01-25 04:51:06; Last Modified: 2022-01-25 15:19:40.
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