[QUOTE=axn;573097]On what hardware?[/QUOTE]
I only have 1 computer at home, Intel Core i7 4930K CPU @3.40 GHz and Nvidia GeForce GTX 780 which were all purchased in year 2013. 
TF depth decisions in GIMPS are properly made based on relative performance of TF, P1, and PRP on the device doing the TF, which should whenever practical be a GPU, with high TF performance relative to the other computation types.
100M exponent TF 7778 306.08 GHD [URL="https://www.mersenne.ca/credit.php?exponent=100000000&frombits=77&tobits=78&worktype=LL"]https://www.mersenne.ca/credit.php?exponent=100000000&frombits=77&tobits=78&worktype=TF[/URL] 100M exponent PRP or LL 381.39 GHD [URL]https://www.mersenne.ca/credit.php?exponent=100000000&frombits=77&tobits=78&worktype=LL[/URL] Radeon VII TF 1113 Ghd/day, 3.712 GHD/d/W, 300 W TDP [URL]https://www.mersenne.ca/mfaktc.php[/URL] PRP 296 GHD/day, 1.053 GHD/d/W, 300 W TDP [URL]https://www.mersenne.ca/cudalucas.php[/URL] ratio TF/LL per day = 1113/296 = 3.76; log2(3.76) ~+2 bits more TF depth than for cpu factoring 306.08/1113 = 0.275 days = 6.6 hours TF 7778 estimate on 100M exponent 381.39/296 = 1.29 days LL estimate on gpu This gpu should be used on PRP/GEC/proof or P1 with a recent version of gpuowl, not on TF GTX780 TF 344 Ghd/day, 1.377 GHD/d/W, 250 W TDP [URL]https://www.mersenne.ca/mfaktc.php[/URL] LL 38.7 GHD/day, 0.166 GHD/d/W, 250 W TDP [URL]https://www.mersenne.ca/cudalucas.php[/URL] ratio TF/LL per day = 344/38.7 = 8.89; log2(8.89) ~+3 bits more TF depth than for cpu factoring 306.08/344 = 0.89 days = 21.35 hours TF 7778 estimate 381.39/38.7 = 9.85 days estimate to LL on gpu PRP/GEC/proof with recent gpuowl version may be a better use of this gpu than TF. The low TF and LL GHD/d/W figures make this ~8 year old gpu a candidate for replacement or nonuse on GIMPS. [URL]https://www.techpowerup.com/gpuspecs/geforcegtx780.c1701[/URL] Perhaps replace with a GTX1650, 75W TDP and save a lot on power costs; similar TF/LL ratio to the RTX2080. At $0.12/kwhr, 24/7 running, each watt of load reduction returns $1/year, paying for the upgrade in a bit over a year, a very good return on investment. GTX1070 TF 747.6, 4.88, 150 LL 47.8, 0.34, 150 ratio TF/LL per day = 747.6/47.8 = 15.64; log2(15.64) ~+4 bits more TF depth than for cpu factoring this gpu probably should be used on TF not P1 or primality testing RTX2080 TF 2623.5, 12.202, 215 LL 60.5, 0.301, 215 ratio TF/LL per day = 2623.5 / 60.5 = 43.36; log2(43.36) ~5.4 bits more TF depth than for cpu factoring 306.08/2623.5 = 0.117 days to TF 7778 estimate for 100M exponent (2.8 hours) 381.39/60.5= 6.3 days estimate to LL This gpu should be used on TF, not P1 or primality testing LL performance above and at mersenne.ca is reflective of CUDALucas, cllucas and very early gpuowl. Faster gpuowl PRP performance with recent versions than the above shifts the tradeoff point toward less TF depth than the above, by almost 1 bit level. (In the case of Radeon VII, log2(525/296) ~0.83 bits lower.) 
[QUOTE=kriesel;573105]The low TF and LL GHD/d/W figures make this ~8 year old gpu a candidate for replacement or nonuse on GIMPS.
[URL]https://www.techpowerup.com/gpuspecs/geforcegtx780.c1701[/URL] Perhaps replace with a GTX1650, 75W TDP and save a lot on power costs; similar TF/LL ratio to the RTX2080. At $0.12/kwhr, 24/7 running, each watt of load reduction returns $1/year, paying for the upgrade in a bit over a year, a very good return on investment.[/QUOTE] I second this recommendation. Upgrading to a 1650 (or 1650 super, if possible) is a quick and painless way to increase you TF thruput 3x and drastically reduce your power consumption at the same time. You might even be able to sell off the 780 and recoup a little bit of the cost. 
[QUOTE=axn;573106]quick and painless way to increase you TF thruput 3x and drastically reduce your power consumption at the same time.[/QUOTE]
My current computer can perform P1 factoring without too much problems. Most exponents still only require up to 2^76 of the trial factoring, so my GPU can handle those. I felt comforted because Ben Delo is finally willing to run PRP tests for lots of my exponent guesses now  M103,353,143 [URL="https://www.mersenne.org/report_exponent/?exp_lo=103353143&exp_hi=&full=1"]https://www.mersenne.org/report_exponent/?exp_lo=103353143&exp_hi=&full=1[/URL] M103,378,153 [URL="https://www.mersenne.org/report_exponent/?exp_lo=103378153&exp_hi=&full=1"]https://www.mersenne.org/report_exponent/?exp_lo=103378153&exp_hi=&full=1[/URL] M103,427,143 [URL="https://www.mersenne.org/report_exponent/?exp_lo=103427143&exp_hi=&full=1"]https://www.mersenne.org/report_exponent/?exp_lo=103427143&exp_hi=&full=1[/URL] M103,674,113 [URL="https://www.mersenne.org/report_exponent/?exp_lo=103674113&exp_hi=&full=1"]https://www.mersenne.org/report_exponent/?exp_lo=103674113&exp_hi=&full=1[/URL] M103,737,103 and M103,737,143 and M103,737,173 [URL="https://www.mersenne.org/report_exponent/?exp_lo=103737103&exp_hi=103737173&full=1"]https://www.mersenne.org/report_exponent/?exp_lo=103737103&exp_hi=103737173&full=1[/URL] 
[QUOTE=tuckerkao;573230]I felt comforted because Ben Delo is finally willing to run PRP tests for lots of my exponent guesses now[/QUOTE]
How many times do people have to explain it to you? Ben Delo is not "willing to run PRP tests for your guesses". He probably doesn't even know you exist, because he is not an active forum user. He just has a lot of AWS machines that get assigned many exponents, including your guesses. He is willing to run PRP tests for GIMPS. Not for you. 
Ben Delo skipped M103,737,157 and M103,737,167, this cannot be the coincidence. As far as I understand, he goes by the numerical orders, not jumping around during the regular situation especially when these.2 exponents are not assigned to other people.
Okay, I finished up the P1 factoring for M103,358,341 around 6 minutes ago and Ben Delo just picked it up several seconds before I edit this comment, he didn't take any other exponents between M103,358,000 and M103,359.000  [URL="https://www.mersenne.org/report_exponent/?exp_lo=103358341&exp_hi=&full=1"]https://www.mersenne.org/report_exponent/?exp_lo=103358341&exp_hi=&full=1[/URL] If these were the random server assignments, he would be on numerous exponents across the several thousand blocks, not only on my guesses. Unless you are informing me that I have the invisible fingers which can magically type those exponents into Ben Delo's computers through the Space Impaler thousands of miles away. 
[url]https://en.wikipedia.org/wiki/Grandiose_delusions[/url]
[url]https://rationalwiki.org/wiki/Don%27t_feed_the_Troll[/url] Ben Delo and many others run mprime or prime95 via PrimeNet connection. It's likely Ben does not see much less select his many many assignments. Billionaires have far more enjoyable ways to spend their time. For throughput of order Ben Delo or curtisc level, lots of scripting runs the show. 
[QUOTE=tuckerkao;573232]Ben Delo skipped M103,737,157 and M103,737,167, this cannot be the coincidence. As far as I understand, he goes by the numerical orders, not jumping around during the regular situation especially when these.2 exponents are not assigned to other people.
[/QUOTE] That's most probably because these exponents don't have P1 done, yet. He gets what PrimeNet gives him, please, correct your knowledge. 
Unless any GIMPS users happen to know you personally, the only contributors to the project who know anything about you are the unfortunate forumites who have to sit here and watch you bloviate about your supposed hold on our top crunchers, who needless to say don't fall into either category. Nobody in GIMPS is your personal PRP tester. We contribute because we want to, and we help others (when we do) because we want to. Ben Delo just does a ton of PRP tests, which happens to include your exponents. He has no idea he's doing your exponents. He doesn't know who you are. He's just doing a huge service to GIMPS and the mathematical community. To PrimeNet, you are just another user (don't get me wrong, every useful GHzday helps), and the fact that you did part of the TF has no bearing on the future assignments of those exponents.

[QUOTE=Viliam Furik;573241]That's most probably because these exponents don't have P1 done, yet.
He gets what PrimeNet gives him, please, correct your knowledge.[/QUOTE] No doubt why curtisc is still running the PRP test for this already known composite number  [URL="https://www.mersenne.org/report_exponent/?exp_lo=107373113&exp_hi=&full=1"]https://www.mersenne.org/report_exponent/?exp_lo=107373113&exp_hi=&full=1[/URL] I'll try to finish up the P1 factoring for more of my exponent guesses, so the server will assign them for more billionaire PRP tests, cannot miss the opportunities. 
[QUOTE=tuckerkao;573270]No doubt why curtisc is still running the PRP test for this already known composite number 
[URL="https://www.mersenne.org/report_exponent/?exp_lo=107373113&exp_hi=&full=1"]https://www.mersenne.org/report_exponent/?exp_lo=107373113&exp_hi=&full=1[/URL][/QUOTE] One of the many computers that are being used at the school where he works simply didn't get the news of it being factored... That happens. 
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