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Old 2016-02-10, 10:53   #10
Batalov
 
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"Serge"
Mar 2008
Phi(4,2^7658614+1)/2

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Quote:
Originally Posted by paulunderwood View Post
I hacked a script in to shape for Carol numbers, but I think it is too giants-biased rather than gwnum:

Code:
time ./a.out ck_test 
(2^100224-1)^2-1 is PRP!
Didn't you want to use -2?
-1 gives you an even number: (2^100224-1)^2-1 = (2^100224-2)*2^100224
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