6391936
This number is a composite.
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6391936^131072+1 is the largest generalized Fermat prime found yet,
with 892028 digits, where 6391936 is palindromic! (Prime Grid) [Sariyar]
Submitted: 2018-06-13 21:12:30; Last Modified: 2018-06-14 01:26:50.
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