[QUOTE=mdettweiler;204326]Everything that isn't a driver's considered a guide, right?[/QUOTE]

Informally, yes. But for a guide 2^a * b * c * ... to be an "official" guide, then b, c etc. must all be factors of sigma(2^a), i.e. 2^(a+1)-1.

[URL="http://factordb.com/search.php?se=1&aq=76686&action=last20"]76686[/URL]: i5105, size 123, 2^3*3*5*7 driver

[URL="http://factordb.com/search.php?se=1&aq=812280&action=last20"]812280[/URL]: i6155, size 125, 2^2*5*7 driver

[URL="http://factordb.com/search.php?se=1&aq=147192&action=range&fr=4620&to=4630"]147192[/URL]: i4628, size 138, acquired [COLOR=blue]downdriver[/COLOR] :cool:

[quote=Batalov;205229][URL="http://factordb.com/search.php?se=1&aq=147192&action=range&fr=4620&to=4630"]147192[/URL]: i4628, size 138, acquired [COLOR=blue]downdriver[/COLOR] :cool:[/quote]
It was good while it lasted... for 5 iterations, that's cool. Not.
i4633: 2^4*5*7. Tough titty.

I currently have two sequences with down-drivers, 709420 and 721980. 709420 had a maximum of 116 digits and is now down to 104 digits. It lost the down driver briefly, but then regained it. 721980 has a max of 105 digits and just recently acquired the down-driver.

Full Status on Feb 11, 2010:
1) 14994 - Index 1802, 125 Digits, 2^2, c118
2) 23142 - Index 1710, 119 Digits, 2^3, c82
3) 511728 - Index 1412, 131 Digits - 2^2*3^2, c95
4) 511734 - Index 650, 108 Digits - 2^3, c91
5) 527436 - Index 1283, 107 Digits - 2^3, c98
6) 527640 - Index 1129, 102 Digits - 2^2, c94
7) 709420 - Index 1039, 105 Digits, 2*5, c95
8) 721980 - Index 1065, 104 Digits, 2*5, c74
9) 733866 - Index 1419, 130 Digits, 2^7*3^2, c85
10) 748350 - Index 1007, 119 Digits, 2^6, c102
11) 748356 - Index 1088, 119 Digits, 2^3*3^2*5, c111
12) 763668 - Index 1108, 118 Digits, 2^2*3^2*5, c116 - Broken in db
13) 791220 - Index 4306, 109 Digits, 2^4*3*7, c98
14) 803236 - Index 506, 104 Digits, 2^3, c100

[URL="http://factordb.com/search.php?se=1&aq=309480&action=last20"]309480[/URL]: i5346, size 123, 2^3*5 guide

[URL="http://factordb.com/search.php?se=1&aq=130396&action=last20"]130396[/URL]: i5144, size 122, 2*3^3

[URL="http://factordb.com/search.php?se=1&aq=767520&action=last20"]767520[/URL]: i4401, size 118, [COLOR=Blue]2^2*3[/COLOR]

[code]02/17/10
Seq Index Size Co-factor Driver/Guide
20916 632 112 107 [COLOR="Red"]2^6 * 127[/COLOR]
170196 1780 136 117 [COLOR="Black"]2^6 * 7[/COLOR]
171018 1905 129 123 [COLOR="Blue"]2^3 * 5 * 7[/COLOR]
363270 1668 144 129 [COLOR="Blue"]2^7 * 3[/COLOR]
604560 2529 136 133 [COLOR="Blue"]2^2 * 3[/COLOR]
[/code]

[code]675600 2920. 2^2 c103 sz 108[/code]
It has just lost a 3 but has a 50% chance of re-acquiring it on the next line. :sad:
ECM is currently running on the c103.