On to 999M  to 70 Bits
Basically I'm looking at the effort remaining to factor all exponents to 999M to 70 bits
I defined the lower bound as 30M but since all exponents from 30M to 100M are already at 70 bits I am only looking at the 100999M ranges. My spreadsheet takes the numbers from: [url]http://www.mersenne.ca/status/tf/0/0/2/0[/url] I've been ciphering and have a few months of stats now....since the above report has been accurate and complete: 1. I take the number of exponents currently at each bit level below 70; 2. I calculate the GhzDays to take those to the next bit level. To make it manageable I:  use the GhzDays to TF the 'mean' exponent up 1 bit level  multiple the count by that number  and 'assume' that range will average out 3. Calculate the expected number to be factored and carry the remaining to the next bit level column 4. Continue up to to 70 bits. And here is a 3month summary: [CODE] 66Exp 66Days 67Exp 67Days 68Exp 68Days 69Exp 69Days TotalDays Aug24 8,762,562 351,170 14,371,316 1,135,950 16,599,700 2,491,221 16,636,680 5,019,375 8,997,716 Sep30 7,931,520 312,019 13,685,155 1,103,546 16,485,174 2,473,561 16,527,300 4,987,211 8,876,337 Oct30 6,996,815 275,606 13,337,018 1,086,349 16,373,884 2,457,974 16,405,450 4,946,490 8,766,419 [/CODE] The 66Exp is the current number of exponents at the 66 bitlevel. The 67Exp is the current number at the 67 bitlevel plus the expected exponents to move up as unfactored from the 66 bitlevel. At the current linear rate of 100,000 GhzDays per Month we have over 7 years to go....Moore's Law to the rescue. 
[QUOTE=petrw1;414326]At the current linear rate of 100,000 GhzDays per Month we have over 7 years to go....Moore's Law to the rescue.[/QUOTE]
A complete and utter waste of time of course. But people should do whatever rocks their boat.... 
[QUOTE=chalsall;414340]A complete and utter waste of time of course.
But people should do whatever rocks their boat....[/QUOTE] Completely agree .... and I have no intention of focusing any efforts there. Though several are. I just find it an "interesting" milestone to watch. 
For 9E8 range (and maybe some lower ones too), I would recommend GPU trialfactoring bit levels 65 to 72 in one swoop. Otherwise more time is wasted loading and unloading, while taking the exponents one bit level at a time.

[QUOTE=TObject;414363]For 9E8 range (and maybe some lower ones too), I would recommend GPU trialfactoring bit levels 65 to 72 in one swoop. Otherwise more time is wasted loading and unloading, while taking the exponents one bit level at a time.[/QUOTE]
Actually not, I didn't try mfakto on that, but mfaktc goes better if only to 70. Of course, the "less classes" version is a must here (or chose 420 classes if you use the version that lets you chose), to get a serious speedup. The one with 4620 classes seems indeed losing time with overhead when the time per class is very small. OTOH, I share the opinion that is not worth to concentrate your resources there. If you "really" and "badly" :smile: need and want to do some LMH, better take all 332M to 80 bits or so. More useful for some big guns doing LL in that area. But the best use of TF resources right now, yes, is the LL front, like 75M to 75 bits (or 74 bits only, if you have a card that is very good at LL/P1/FFT, don't do the 75th bit, and better do some P1 for the same expo instead). 
As of 20161101
I compute approximately 6.4M Ghz Days of work left.
[CODE]YYYYMM 67Exp 67Days 68Exp 68Days 69Exp 69Days TotalDays 201611 4,389,521 303,507 13,240,976 1,989,772 13,493,464 4,117,564 6,410,843 [/CODE] 
To be fair ... and of more interest ...
Here is the forum for finishing to 75Bits up to 100M
[url]http://www.mersenneforum.org/showthread.php?p=446178#post446178[/url] 
As of April 16, 2017
[CODE]YYYYMM 68Exp 68Days 69Exp 69Days TotalDays
201704 9844184 1541819.288 11028563.67 3526501.028 5,068,320.316 [/CODE] 
[QUOTE=petrw1;446170]I compute approximately 6.4M Ghz Days of work left.
[CODE]YYYYMM 67Exp 67Days 68Exp 68Days 69Exp 69Days TotalDays 201611 4,389,521 303,507 13,240,976 1,989,772 13,493,464 4,117,564 6,410,843 [/CODE][/QUOTE] That's only 33 years (calendar) on a SINGLE gtx970. Doesn't seem that daunting a task... 
And we're done.
Only took 4 years and a bit.
Note my initial estimate was 7 years so Moore did help. 
Current ranges for minimum factored bit depths:
[CODE] 2^64: 0 M  1000 M [URL="https://www.mersenne.org/report_factoring_effort/?exp_lo=1&exp_hi=999999999&bits_lo=1&bits_hi=63&tftobits=72"]Link[/URL] 2^65: 0.044 M  1000 M [URL="https://www.mersenne.org/report_factoring_effort/?exp_lo=43000&exp_hi=999999999&bits_lo=1&bits_hi=64&tftobits=72"]Link[/URL] 2^66: 0.380 M  1000 M [URL="https://www.mersenne.org/report_factoring_effort/?exp_lo=379000&exp_hi=999999999&bits_lo=1&bits_hi=65&tftobits=72"]Link[/URL] 2^67: 0.795 M  1000 M [URL="https://www.mersenne.org/report_factoring_effort/?exp_lo=794000&exp_hi=999999999&bits_lo=1&bits_hi=66&tftobits=72"]Link[/URL] 2^68: 1.5 M  1000 M [URL="https://www.mersenne.org/report_factoring_effort/?exp_lo=1499000&exp_hi=999999999&bits_lo=1&bits_hi=67&tftobits=72"]Link[/URL] 2^69: 9.934 M  1000 M [URL="https://www.mersenne.org/report_factoring_effort/?exp_lo=9933000&exp_hi=999999999&bits_lo=1&bits_hi=68&tftobits=72"]Link[/URL] 2^70: 19.965 M  1000 M [URL="https://www.mersenne.org/report_factoring_effort/?exp_lo=19965000&exp_hi=999999999&bits_lo=1&bits_hi=69&tftobits=72"]Link[/URL] 2^71: 29.68 M  200.1 M [URL="https://www.mersenne.org/report_factoring_effort/?exp_lo=29678000&exp_hi=200103000&bits_lo=1&bits_hi=70&tftobits=72"]Link[/URL] 2^72: 39.56 M  180.3 M [URL="https://www.mersenne.org/report_factoring_effort/?exp_lo=39559000&exp_hi=185550000&bits_lo=1&bits_hi=71&tftobits=72"]Link[/URL] 2^73: 44.9 M  100 M [URL="https://www.mersenne.org/report_factoring_effort/?exp_lo=44899000&exp_hi=100117500&bits_lo=1&bits_hi=72&tftobits=72"]Link[/URL] 2^74: 56 M  94 M [URL="https://www.mersenne.org/report_factoring_effort/?exp_lo=55980000&exp_hi=94532000&bits_lo=1&bits_hi=73&tftobits=72"]Link[/URL] 2^75: 70 M  93.52 M [URL="https://www.mersenne.org/report_factoring_effort/?exp_lo=69900000&exp_hi=93529000&bits_lo=1&bits_hi=74&tftobits=72"]Link[/URL] 2^76: 82.91 M  93.04 M [URL="https://www.mersenne.org/report_factoring_effort/?exp_lo=82900000&exp_hi=93050000&bits_lo=1&bits_hi=75&tftobits=72"]Link[/URL] [/CODE] 
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