Subproject #4: 10k-50k sequences to 110 digits - Page 25

firejuggler · 2010-05-30, 22:42

done with 43980, 111 digits, 2^6*3 driver

firejuggler · 2010-05-31, 08:44

taking 40872

unconnected · 2010-05-31, 10:39

41784: i889, size 111, 2^5*3*7

smh · 2010-05-31, 11:03

Releasing 40500 and 40722

Reserving 40518, 40866

Andi47 · 2010-06-01, 11:24

Unreserving 40096 at i=2421, size 116, 2^3*3. (the driver had changed from 2^4*3*31 directly to 2^3*3 in line 2373.)

Reserving 40224.

firejuggler · 2010-06-01, 19:04

done with 40872, 2^6*5 driver
taking 42312

10metreh · 2010-06-01, 19:49

Quote:

Originally Posted by firejuggler

done with 40872, 2^6*5 driver

Actually it's 2^6*127, which is a very nasty driver.

firejuggler · 2010-06-01, 19:57

871 say 2^6*5*127... i suppose you ommit 5 cause 2^6>5?
or because 870 is 2^6*127...
(sorry for all the question i'm still learning)
and now 2^6*5^2*127 for 875
(at the time of first post was finishing 871)

Mini-Geek · 2010-06-01, 20:57

Quote:

Originally Posted by firejuggler

871 say 2^6*5*127... i suppose you ommit 5 cause 2^6>5?
or because 870 is 2^6*127...
(sorry for all the question i'm still learning)
and now 2^6*5^2*127 for 875
(at the time of first post was finishing 871)

The driver isn't always just the smallest factors, especially when dealing with 2^6*127. The driver in these cases is still 2^6*127, even though it also has a 5^2 factor. The 5^2 factor isn't part of the driver, it just makes the sequence grow quicker as long as it's in there.
A list of drivers is at:
http://mersennewiki.org/index.php/Aliquot_Sequences

firejuggler · 2010-06-01, 21:17

so, not only does it have a 'perfect' driver (the worst of them), but the 5^2 make it even worse?

Mini-Geek · 2010-06-01, 21:22

Quote:

Originally Posted by firejuggler

so, not only does it have a 'perfect' driver (the worst of them), but the 5^2 make it even worse?

Yep. Fortunately, since it's not part of the driver, the 5^2 is unstable (i.e. it's likely to go away at any time).

2010-06-01, 19:57	#272
firejuggler Apr 2010 Over the rainbow 2·1,303 Posts	871 say 2^65127... i suppose you ommit 5 cause 2^6>5? or because 870 is 2^6127... (sorry for all the question i'm still learning) and now 2^65^2127 for 875 (at the time of first post was finishing 871) Last fiddled with by firejuggler on 2010-06-01 at 20:50*

2010-06-01, 21:17	#274
firejuggler Apr 2010 Over the rainbow 2×1,303 Posts	so, not only does it have a 'perfect' driver (the worst of them), but the 5^2 make it even worse? Last fiddled with by firejuggler on 2010-06-01 at 21:18

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2010-05-30, 22:42	#265
firejuggler Apr 2010 Over the rainbow A2E₁₆ Posts	done with 43980, 111 digits, 2^6*3 driver

2010-05-31, 08:44	#266
firejuggler Apr 2010 Over the rainbow 2×1,303 Posts	taking 40872

2010-05-31, 10:39	#267
unconnected May 2009 Russia, Moscow 2,593 Posts	41784: i889, size 111, 2^537

2010-05-31, 11:03	#268
smh "Sander" Oct 2002 52.345322,5.52471 1189₁₀ Posts	Releasing 40500 and 40722 Reserving 40518, 40866

2010-06-01, 11:24	#269
Andi47 Oct 2004 Austria 9B2₁₆ Posts	Unreserving 40096 at i=2421, size 116, 2^33. (the driver had changed from 2^4331 directly to 2^33 in line 2373.) Reserving 40224.

2010-06-01, 19:04	#270
firejuggler Apr 2010 Over the rainbow 2·1,303 Posts	done with 40872, 2^6*5 driver taking 42312