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Forum: Sierpinski/Riesel Base 5

2005-02-14, 02:15

Replies: 358

Sierpinski/Riesel Base 5: Post Primes Here

Views: 41,138

Posted By pcco74

Hey, 51460*5^50468+1 is prime. (35281 digits) ...

Hey, 51460*5^50468+1 is prime. (35281 digits)

Primality testing 51460*5^50468+1 [N-1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 2
Calling Brillhart-Lehmer-Selfridge with factored...

Forum: Sierpinski/Riesel Base 5

2005-02-02, 19:43

Replies: 358

Sierpinski/Riesel Base 5: Post Primes Here

Views: 41,138

Posted By pcco74

The reason k must be odd for base 2 is that if k...

The reason k must be odd for base 2 is that if k is even, you can always divide it by 2 until you get an odd k, and increase n accordingly. Ex. 10*2^2+1=5*2^3+1. This simply eliminates testing the...

Forum: Sierpinski/Riesel Base 5

2005-02-02, 14:01

Replies: 358

Sierpinski/Riesel Base 5: Post Primes Here

Views: 41,138

Posted By pcco74

Yves Gallot's site also lists n as having to be...

Yves Gallot's site also lists n as having to be greater than or equal to one. http://www.prothsearch.net/sierp.html

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