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Old 2016-03-15, 20:55   #10
NorbSchneider
 
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"Norbert"
Jul 2014
Budapest

5·19 Posts
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I search PRPs of the form y^x-x^y.
I made a webpage to these PRPs, you can find the page at http://primfakt.atw.hu/
Andrey Kulsha's site contains y^x+x^y PRPs, the URL is: http://www.primefan.ru/xyyxf/primes.html
y^x-x^y PRPs exists much more than y^x+x^y PRPs.
For example to x= 5000 894 y^x-x^y and 426 y^x+x^y PRPs,
x=10000 1530 y^x-x^y and 787 y^x+x^y PRPs.
I have all the y^x-x^y PRPs to x=10800, and a few for higher x values.
Are you interesting to join me searching the y^x-x^y PRPs?
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