20479
This number is a prime.
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The largest prime less than a googol of form (x-1)*2^x-1, where x is a prime, case x=11), i.e., 10*2^11-1=20479. [Loungrides]
Submitted: 2012-09-21 05:55:07; Last Modified: 2020-05-20 17:37:03.
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