Subproject #3: 700k-800k sequences to 100 digits - Page 28

Mini-Geek · 2009-12-06, 13:30

Quote:

Originally Posted by EdH

I ran across a couple of new prime factors for iteration 574 of number 730536 while playing with a C++ program I'm writing and playing with. Those factors are:

12541 and 71670491

I really have no easy way to verify my findings, so I don't know if they are valid.

They are. http://factordb.com/search.php?se=1&...&fr=574&to=574 Syd's DB is already well past iteration 574 for aliquot sequence 730536. 10metreh: But it wasn't when EdH posted.

Quote:

Originally Posted by EdH

Do new factors get tested when entered?

Yes. The DB always checks that new factors do indeed divide the number, and will simply ignore any factors that don't work. It will also calculate the remaining portion and whether that is composite or prime.

rodac · 2009-12-06, 14:12

Done with 730224, 100 digits, 2*3

unconnected · 2009-12-06, 15:17

done with 730428: size 100, 2^4*3*31
reserving 735294, 735960, 736002, 736680, 737490, 737640, 738528, 738678, 739398, 739788.
735966 is done for the subproject

Andi47 · 2009-12-06, 16:09

unreserving 730260 at size 100, 2²*7

Andi47 · 2009-12-07, 19:10

reserving 734052

Batalov · 2009-12-08, 11:04

Done with
730536, 730680, 731208, 731232, 731424, 731500, 731562,
735096, 736794, 736820, 736938, 737550, 738072, 738288,
and 650496 (because 736938 merged in it)

731208 extended from i362 to i3,831 (after reaching 100-digits already at i419)... too bad.

I'll keep 737550 reserved for the other thread.

Greebley · 2009-12-08, 12:23

Reserving
739032, 739152, 739254, 739302, 739464, 739686, 739920

Greebley · 2009-12-08, 15:11

Done with 733800, 102 digits, 2^2*3*7
Keeping 733866 reserved at 114 digits (so done for project). It has the guide 2^11*3*5*7 which is 5 factors of 2 short (the full guide 2^11*3*5*7*39 is only 2 short so just misses being a driver).

Andi47 · 2009-12-08, 18:37

unreserving 734052; i=638, sz. 101, 2²*3*7

Greebley · 2009-12-08, 21:41

Quote:

Originally Posted by Greebley

Done with 733800, 102 digits, 2^2*3*7
Keeping 733866 reserved at 114 digits (so done for project). It has the guide 2^11*3*5*7 which is 5 factors of 2 short (the full guide 2^11*3*5*7*39 is only 2 short so just misses being a driver).

Err. Ignore the full guide statement - it is wrong.

Batalov · 2009-12-09, 03:15

Taking 736944, 737034, 737160, 737240, 737664

2009-12-08, 11:04	#303
Batalov "Serge" Mar 2008 Phi(4,2^7658614+1)/2 9,497 Posts	Done with 730536, 730680, 731208, 731232, 731424, 731500, 731562, 735096, 736794, 736820, 736938, 737550, 738072, 738288, and 650496 (because 736938 merged in it) 731208 extended from i362 to i3,831 (after reaching 100-digits already at i419)... too bad. I'll keep 737550 reserved for the other thread. Last fiddled with by Batalov on 2009-12-08 at 11:12 Reason: keeping 737550

2009-12-09, 03:15	#308
Batalov "Serge" Mar 2008 Phi(4,2^7658614+1)/2 9,497 Posts	Taking 736944, 737034, 737160, 737240, 737664 Last fiddled with by Batalov on 2009-12-09 at 03:24

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2009-12-06, 14:12	#299
rodac Sep 2009 73 Posts	Done with 730224, 100 digits, 2*3

2009-12-06, 15:17	#300
unconnected May 2009 Russia, Moscow 2,593 Posts	done with 730428: size 100, 2^4331 reserving 735294, 735960, 736002, 736680, 737490, 737640, 738528, 738678, 739398, 739788. 735966 is done for the subproject

2009-12-06, 16:09	#301
Andi47 Oct 2004 Austria 2×17×73 Posts	unreserving 730260 at size 100, 2²*7

2009-12-07, 19:10	#302
Andi47 Oct 2004 Austria 2·17·73 Posts	reserving 734052

2009-12-08, 12:23	#304
Greebley May 2009 Dedham Massachusetts USA 3×281 Posts	Reserving 739032, 739152, 739254, 739302, 739464, 739686, 739920

2009-12-08, 15:11	#305
Greebley May 2009 Dedham Massachusetts USA 3×281 Posts	Done with 733800, 102 digits, 2^237 Keeping 733866 reserved at 114 digits (so done for project). It has the guide 2^11357 which is 5 factors of 2 short (the full guide 2^11357*39 is only 2 short so just misses being a driver).

2009-12-08, 18:37	#306
Andi47 Oct 2004 Austria 2×17×73 Posts	unreserving 734052; i=638, sz. 101, 2²37