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Old 2021-05-15, 00:16   #19
Batalov
 
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Mar 2008
Phi(4,2^7658614+1)/2

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Quote:
Originally Posted by R. Gerbicz View Post
But you shouldn't fix base=3 to all numbers, because for other type of numbers: N could be a (trivial) pseudoprime for base=3, and you need to choose another base.
Exactly right. Eisenstein-Mersennes, for example, or also some Zhou's 3-3-1 primes
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