4295032837
This number is a prime.
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The largest known prime sum of three Fermat numbers.
According to the Maple 9 primality test, the next term is
larger than 10^300 if it exists [R. J. Mathar, Oct 16
2009]. [Post]
Submitted: 2009-10-22 19:05:53; Last Modified: 2009-11-03 01:48:25.
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