1.3 GHz Thunderbird Athlon

Even though I am not yet an LMH (have to dig the 200MMX machine out and get it going),

I was wondering, is there any semi-co-ordinated work being done to thin out the predicted "sweet-spots"? Like the range near 33M? I would think that this is one where dealing out narrow bands to multiple people would lend to rapid completetion and then a run again at the next higher bit level.

For example:
The sweet spot peaks at say 33.35M, 3 workers on the team at first.
Sliver up 33.0-33.7 into say 3 chunks to go from 2^60 - 2^61
Turn in results.
Let one person work on the 2 side ranges upto 2^64
Split the center range in half and run up 2^62, then 2^63.
Take the center range and split into 3 pieces, run to 2^64, adding a new body.
Leave one working the two smaller ranges upto 2^66.
Split the center again in half and run to 2^66
Split the range into 3 and add a memeber and run up to 2^67.
Repeat until at least upto the predicted point of cost>benefit.

Turn over sweetspot numbers to a crew with P-1 monsters. 400MB plus machines.

Update from Sept 8:

- 849 new factors found, since the last update.
- most activity on the 58 bit depth.

[code:1]
Bits Depth Diff
---- ------- ------
57 26643 0
58 449775 (37413)
59 342963 19623
60 522670 14522
61 17220 1310
62 15911 966
63 4487 (257)
64 3710 251
65 3 0
66 8 0
67 6 0
68 6953 146
69 44 0
70 6 2
71 6 0
72 18 1
73 0 0
74 1 0
---- ------- ------
Tot: 1390424 (849)
[/code:1]

[quote]Even though I am not yet an LMH (have to dig the 200MMX machine out and get it going),

For example:
The sweet spot peaks at say 33.35M, 3 workers on the team at first.
Sliver up 33.0-33.7 into say 3 chunks to go from 2^60 - 2^61
Turn in results. etc..... [/quote]

33.2-33.6 have been placed in PrimeNet, and are therefore not for usage by people in LMH.

Update from the 21st of September:

57 26491
58 395727
59 350502
60 547489
61 28745
62 22317
63 5326
64 4265
65 3
66 8
67 6
68 7139
69 44
70 6
71 6
72 18
73 0
74 1
---- ------- ------
Tot: 1388093 (2331)

Keep going!...

[code]
Bits Exponents (9/29/03)
57 26483
58 382203
59 342848
60 564292
61 29062
62 25100
63 5621
64 4346
65 3
66 8
67 6
68 7261
69 44
70 6
71 6
72 18
73 0
74 1
---------------
Total 1387308 (785)
[/code]

Some other vital statistics:

In the range of exponents from 25M to 79.3M, we expect to prove about 231991 exponents composite through trial factoring to GIMPS' proscribed factoring limits, and this will save about 4515695 P-90 CPU-years of first time LL tests.

Below 25M, we expect to prove about 7982 exponents composite through trial factoring, and save about 18570 P-90 CPU-years of first time LL tests.

Expected number of factors computed using factoring limits and probability function on [url]www.mersenne.org/math.htm[/url] (10/7/2003) and data from the 9/29/2003 edition of nofactor.cmp

Cost computed with additional range and average cost data on [url]www.mersenne.org/status.htm[/url] (10/7/2003)

Your milage may vary.

[code]
Bits Exponents (10/8/2003)
57 19846
58 376607
59 320506
60 593270
61 28080
62 30499
63 5395
64 4572
65 3
66 8
67 6
68 7394
69 44
70 7
71 6
72 18
73 0
74 1
Total 1386262 (1046)
[/code]
Keep up the good work!

[code]
Bits Exponents (10/23/03)
57 5624
58 369095
59 310528
60 615754
61 25987
62 39845
63 5396
64 4786
65 9
66 8
67 6
68 7661
69 44
70 7
71 6
72 18
73 0
74 1
Total 1384775 (1487)
[/code]

We seem to be moving a lot of exponents up from 57 bits, and 60 bits is rapidly becoming the next plateau. Good work all!

Gosh! Somebody just did some 400000 range of exponents from 29.2 to 29.6M from 57 to 58. I have been carrying this range all the way up o 60 and doing 3 bits takes a lot of time but it sure feels bad to be poached!!

Sorry to hear that. Since the factoring reports don't keep user info, maybe we could get George to tell this other guy he's duplicating work?