20060329, 03:04  #1 
Jul 2003
wear a mask
555_{16} Posts 
f14 complete
The original Sierpinski and Riesel problems counted the number of primes found in intervals f_m: 2^m <= n < 2^(m+1). See:
http://www.prothsearch.net/rieselprob.html http://www.prothsearch.net/sierp.html We just completed phase 14, by testing all of our candidates past n=32768. By my count, we have 275 k values (mostly Riesels) to test up to n=65536, before we complete f15. Anyone want to conjecture how long it will take us? Anyone want to help? There's a lot of lowhanging fruit around here... 
20060330, 21:17  #2 
Jun 2003
41×113 Posts 
Probably we should think about doing it by 'n' instead of doing it by the 'k'  like SOB, RieselSieve, PSP, etc.

20060423, 16:05  #3 
Jul 2003
wear a mask
3×5×7×13 Posts 
I did some testing and came up with the following distribution for the Sierpinski numbers:
F0: 15961 F1: 20145 F2: 17679 F3: 11551 F4: 6436 F5: 3399 F6: 1861 F7: 1082 F8: 612 F9: 377 F10: 274 F11: 189 F12: 131 F13: 67 F14: 48 F15: 53 F16: 16 F17: 4 These are the number of k values that have their first prime in the F_n interval. Note, F15F17 are not complete yet. I'm going to try to come up with the corresponding Riesel distribution. Any doublechecks would be appreciated. 
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