2611*2^5232991 is prime
2625*2^5235241 is prime 2397*2^5240861 is prime 
2563*2^5251511 is prime!
I seem to have much better luck on NPLB than CRUS. I wonder if this is just chance or if there's something unknown about prime distribution on base 2 vs other bases... 
[quote=MiniGeek;201744]2563*2^5251511 is prime!
I seem to have much better luck on NPLB than CRUS. I wonder if this is just chance or if there's something unknown about prime distribution on base 2 vs other bases...[/quote] It's probably not so much about the base as it is about the fact that CRUS's k's are extremely biased towards the lowweight end of the spectrum: after all, there's a reason why they've held on as long as they have without a prime. :smile: NPLB, on the other hand, is searching a very large contiguous krange, which is quite ideal for finding lots of primes. 
1731*2^6674351 is prime
1875*2^6678531 is prime 
1879*2^6685171 is prime. Found by my little ASUS eeePC 701 :smile:

[quote=vaughan;202375]1879*2^6685171 is prime. Found by my little ASUS eeePC 701 :smile:[/quote]
impressive for such a slow pc:smile: 
2223*2^5254761 is prime
2643*2^5255281 is prime 2715*2^5255301 is confirmed prime 2691*2^5256061 is prime 2717*2^5260161 is prime 2829*2^5264831 is prime 2941*2^5264931 is confirmed prime 2183*2^5277641 is prime 2537*2^5281641 is prime 1549*2^6693871 is prime 
2445*2^5284231 already in database

2429*2^5286801 is prime

2575*2^5287131 is prime

2379*2^5291811 is prime
2259*2^5293401 is prime 2067*2^5298881 is prime 2533*2^5311631 is prime 2993*2^5313621 is prime 2397*2^5314941 is prime 2543*2^5319241 is prime 2395*2^5323131 is prime 
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