2009-10-05, 18:27 | #1 |
Jan 2006
Hungary
10C_{16} Posts |
Base 13 prime found
Hi everyone,
one of my side projects has given me a large prime. I had noticed that there was no prime with base 13 in the top 5000. So I found one: Primality testing 6710*13^142143-1 [N+1, Brillhart-Lehmer-Selfridge] Running N+1 test using discriminant 11, base 1+sqrt(11) Calling Brillhart-Lehmer-Selfridge with factored part 100.00% 6710*13^142143-1 is prime! (10738.7531s+0.0591s) Other bases that need the same treatment: base 7, 11 have +1 but no -1 base 13 has -1 but no +1 Base 14 has no entries. Cheers, Willem. -- PS what would be the most fitting subforum? I decided on CRUS because this is where i hang out. |
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