20181215, 23:24  #112  
"Jeppe"
Jan 2016
Denmark
160_{10} Posts 
Quote:
/JeppeSN 

20181216, 00:17  #113 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
10001110100011_{2} Posts 
Yes, there are many more; I've seen duplicates in other classes before. (Because there are similarly different ways to write values, e.g. using Phi(), or gcd() ... for primitive parts or Aurifeuillean parts. PRP owners should better have an intake evaluator and checker.
The bracketed form is hard to search for. You can use "x^?+y^?" and then filter, but that's not the first form that comes to mind. 
20181216, 01:57  #115 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
3·3,041 Posts 
How far did anybody search?

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