20190614, 22:19  #1134 
"Will Conway"
May 2018
UK
1000000_{2} Posts 
Do you think we could expand the OBD range at some point? I know it seems a while off but with the recent burst of activity there’s a possibility that we might run out of exponents.
Taking 3321931967 up to 84 bits Last fiddled with by WGJC3107 on 20190614 at 22:19 
20190614, 22:30  #1135 
"James Heinrich"
May 2004
exNorthern Ontario
2×3×19×31 Posts 
For my site I have defined OBD range as between 3,321,928,097 and 3,321,935,999
I can easily adjust the upper limit if there is consensus to do so. 
20190615, 09:01  #1136  
Banned
"Luigi"
Aug 2002
Team Italia
4834_{10} Posts 
Quote:
Right now, it seems that we users are quite oriented to the result, so we could well extend a bit the ranges. I could put my GT 710 back to work presieving very low exponents in background (taking exponents up to M3,321,939,983 from 72 bits to 73 or 74) and leave them to people having more powerful boards, but lower than RTX 20xx 

20190615, 11:39  #1137  
Banned
"Luigi"
Aug 2002
Team Italia
1001011100010_{2} Posts 
Quote:


20190615, 11:40  #1138  
Banned
"Luigi"
Aug 2002
Team Italia
2·2,417 Posts 
Quote:


20190615, 13:25  #1139 
Oct 2007
Manchester, UK
552_{16} Posts 
I don't know which specific exponents you were checking, but I looked at the first few above the OBD range without factors and found TF work to 75 bits submitted in 2014.
Additionally, I think that at one point James said somewhere that he was doing some low level bulk TFing, but I have no idea in what range or on what hardware. 
20190615, 14:01  #1140  
"James Heinrich"
May 2004
exNorthern Ontario
3534_{10} Posts 
Quote:
Generally you won't have any conflict between OBD and breadthfirst TF work since the OBD range is already TF'd so high. Outside that range, everything is TF'd to at least 67 and heading towards 71. If you look at the last30day report for the 3321M range https://www.mersenne.ca/status/tf/0/30/3/332000 you can see that there has been ~50 highlevel TF progress (83+) but also >1300 exponents outside OBD range being taken to 72. OBD and tf1G pages share a common reservation system, so as long as you're reserving the exponents you want to work on, nobody should step on your toes. If you want to work to lower bitlevels outside the exponent range shown on the OBD page, please reserve the exponents you want on the tf1G page. The 1000M4294M bulk TF work was done in 20142015 taking the whole range to 64. Since then this range has been managed by the tf1G page. In 2018 I also bulkTF'd the range of 4294M10000M to 55 using my CPU, but since no GPU TF software can handle this range (yet) it is not available for reservation. 

20190615, 15:41  #1141  
Banned
"Luigi"
Aug 2002
Team Italia
2·2,417 Posts 
Quote:
I tried to reserve 1 exponent to take from 72 to 73 bits, namely 3321936811. Using the following input: 3321936810 3321936812 73 72 1 and was given no exponent (no assignment found). Then I tried to change 3321936812 with 3321941999. Still no exponent reserved (no assignment found). But from https://www.mersenne.ca/exponent/bro...001/3321939999 it seems that there are a lot of available exponents... Last fiddled with by ET_ on 20190615 at 15:45 

20190615, 16:14  #1142  
"James Heinrich"
May 2004
exNorthern Ontario
2·3·19·31 Posts 
Quote:
As a quick summary for the 3321M range, the available exponent counts are currently: Code:
++++  mrange  tf  howmany  ++++  3321  fact  23273   3321  67  18840   3321  69  9   3321  74  67   3321  75  29   3321  80  2   3321  83  39   3321  84  47   3321  85  25   3321  86  7  ++++ Code:
++++  mrange  tf  howmany  ++++  3321  fact  1840   3321  72  1241   3321  74  67   3321  75  29   3321  83  43   3321  84  50   3321  85  26   3321  86  8  ++++ 

20190615, 16:43  #1143  
Banned
"Luigi"
Aug 2002
Team Italia
1001011100010_{2} Posts 
Quote:
When I ran the project, once the exponent was assigned to a bitlevel, my page showed the exponent AT the RESERVED bitlevel, not the ACTUAL bitlevel, so that others could reserve the same exponent to a higher bitlevel. If the reservation was completed the situation was ready for the next reservation, else the bitlevel of the relative exponent was rollbacked. As the users were few, we never had a hole to close, and even in that case I would have provided the patch. Thank you for your patience. 

20190615, 23:14  #1144 
"James Heinrich"
May 2004
exNorthern Ontario
6716_{8} Posts 

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