20120420, 06:43  #188  
"Frank <^>"
Dec 2004
CDP Janesville
2·1,061 Posts 
I reported some in midFebruary that had errors. I assume he probably saw that post.
Quote:
Quote:


20120427, 14:36  #189 
May 2009
Dedham Massachusetts USA
3·281 Posts 
I thought the following was fairly interesting. 3 very close values due to a fairly large twin prime and the smallest perfect number.
Its from 1278480 Code:
639 . 799858816619302473118275277197659899244830242353880362391892241816431088334 = 2 * 3 * 133309802769883745519712546199609983207471707058980060398648706969405181389 640 . 799858816619302473118275277197659899244830242353880362391892241816431088346 = 2 * 3 * 133309802769883745519712546199609983207471707058980060398648706969405181391 641 . 799858816619302473118275277197659899244830242353880362391892241816431088358 = 2 * 3^4 * 761 * 22484149900539495426601355003279 * 288560706695245341536872445882282707061 
20120503, 15:31  #190 
Apr 2010
Over the rainbow
2·1,279 Posts 
my intent was to prove a prp...
Code:
ecm c 0 I 3 pm1 1e6 GMPECM 6.4.2 [configured with MPIR 2.5.1] [P1] ((10^10261*1753)/1171)/6786181321342109281057159754389466902690195104791235362 81023370974655782538755407244697801814863543444869917694106309498851317761583170 68103321824866326322285987965460176946277035301962791203854117391535953963443676 17891944265398744331006625410 Input number is ((10^10261*1753)/1171)/678618132134210928105715975438946690269 01951047912353628102337097465578253875540724469780181486354344486991769410630949 88513177615831706810332182486632632228598796546017694627703530196279120385411739 153595396344367617891944265398744331006625410 (10017 digits) Using B1=1000000, B2=1886622346, polynomial x^1, x0=1658312913 Step 1 took 258571ms ********** Factor found in step 1: 736183775266768523893900375053395802969185549 51655966849831359960431422235080541496408420471541729971200601733084494089627298 49378437198833676462908885696598898164282261456345843479014392667128462193581071 407176013873331705151383870773153395169197737 Found composite factor of 250 digits: 736183775266768523893900375053395802969185 54951655966849831359960431422235080541496408420471541729971200601733084494089627 29849378437198833676462908885696598898164282261456345843479014392667128462193581 071407176013873331705151383870773153395169197737 Composite cofactor (((10^10261*1753)/1171)/67861813213421092810571597543894669 02690195104791235362810233709746557825387554072446978018148635434448699176941063 09498851317761583170681033218248663263222859879654601769462770353019627912038541 1739153595396344367617891944265398744331006625410)/73618377526676852389390037505 33958029691855495165596684983135996043142223508054149640842047154172997120060173 30844940896272984937843719883367646290888569659889816428226145634584347901439266 7128462193581071407176013873331705151383870773153395169197737 has 9767 digits 
20120503, 20:56  #191 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
2^{3}·11·107 Posts 
1. What does it have to do with aliquots?
2. 10260 = 2 * 2 * 3 * 3 * 3 * 5 * 19, so of course (10^102601) has zillions of small factors. It is 35.20% factored, so proof is very easy Last fiddled with by Batalov on 20120503 at 21:08 
20120514, 05:54  #192 
"Frank <^>"
Dec 2004
CDP Janesville
2×1,061 Posts 
Well, since we pushed 4788 over 3600 lines, that means that 314718 is now at 11,000_ lines....only the second sequence to achive that mark!

20120817, 09:07  #193 
"Frank <^>"
Dec 2004
CDP Janesville
2×1,061 Posts 
Wow! Just noticed this one from fivemack: reserved way back a year ago, 119472 will serve as an inspiration to LaurV:
Code:
380 . 654702352433694915020223628642043797670553520375330529218431265284942258850788966224056062658369740959788317261748860966077034120 = 2^3 * 3^2 * 5 * 357900440399204822434551219282872874284233697 * 5081350678475424188901179711470674268623940177115332661993165354633542489261829461 381 . 1473080292975813558795503164444598544758745426789673984557716647905500344834964068712879663473340773939952105321140912522567222800 = 2^4 * 3^2 * 5^2 * 52241115139331 * 432682209368494736440069736227561325042261 * 18102661942937583150461608299215040466766794766017755199741200190181503 
20121116, 05:16  #195  
Basketry That Evening!
"Bunslow the Bold"
Jun 2011
40<A<43 89<O<88
3×29×83 Posts 
Quote:
Has anyone ever escaped the D6 above 100 digits? 

20121116, 10:58  #196 
(loop (#_fork))
Feb 2006
Cambridge, England
13·491 Posts 
Yes; 19494 loses 2^6*127 between iterations 1527 and 1529, at 120 digits.
966180 loses 2^6*127 between iterations 2667 and 2669, at 107 digits Last fiddled with by fivemack on 20121116 at 11:07 
20121129, 18:11  #197 
(loop (#_fork))
Feb 2006
Cambridge, England
18EF_{16} Posts 
Woah!
http://www.factordb.com/sequences.ph...r=2244&to=2246
Code:
2176...=2^3*351761333792801269*25356551767842855735377*3050768335867988943102114407401134146256546294637884878439784097681804298170079324983823302833 1904...=2^18*23*31592049788968711916177574027287172876807461062046384435626327044988312164831828232373474413053383283349194768155648600900453389 ^^^^ 2070...=2^4*7*13*1249*250867*1105339387*410575613031300368528610633240316067333040739426517304279238611570239780248119375461533099612652475877729165957777 Last fiddled with by fivemack on 20121129 at 18:11 
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