3x+1 Class records calculation progress map
Status of the 3x+1 class record progress as of: Jan 14, 2020.
Intervals are indicated in blocks of 100,000,000,000,000 (100 E+12 or 100 trillion numbers).
Calculation of a single block takes approximately 7 days of (idle) time on 2.4 GHz processor.

All class records found so far can be viewed on the class records page.
This project can only run because of many cooperating contributors.
If you would like to contribute one or more blocks please go to the search page.
Note : the 3x+1 problem is just one of many distributed projects on the internet. 		Trajectory of 63,728,127
Progress history
January 8 2020 : All blocks up to 603,900 completed.
December 25 2019 : All blocks up to 602,000 completed. Four more class records confirmed.
December 21 2019 : All blocks up to 582,900 completed. Lowest missing class record (2073) and four others confirmed.
December 15 2019 : All blocks up to 563,300 completed.
September 29 2019 : All blocks up to 561,200 completed. Delay record 2277 and eight more class record confirmed.
July 11 2019 : All blocks up to 509,000 completed. One more class record confirmed.
May 12 2019 : All blocks up to 506,600 completed. One more class record confirmed.
May 5 2019 : All blocks up to 500,000 completed. Delay record 2264 and five more class records confirmed.
April 5 2019 : All blocks up to 476,400 completed. Three more class records confirmed.
Show/Hide earlier milestones
March 2019 : All blocks up to 455,200 completed. Lowest missing class record (2070) and four others confirmed.
December 2018 : All blocks up to 387,000 completed. Delay record 2261 and nine more class records confirmed.
October 2018 : All blocks up to 366,400 completed. Six more class records confirmed.
June 2018 : All blocks up to 346,000 completed. Three more class records confirmed.
December 2017 : All blocks up to 326,500 completed. Five more class records confirmed.
May 2017 : All blocks up to 305,400 completed. 258 reached. Two more class record confirmed.
October 2016 : All blocks up to 280,000 completed. Delay record 2258 and two more class records confirmed.
March 2016 : All blocks up to 275,200 completed. Four more class records confirmed.
March 19 2016 : Possible new Delay Record (Delay 2258) found by Lutz.
December 2015 : All blocks up to 263,350 completed. Four more class records confirmed. 2100 class records known.
July 2015 : All blocks up to 245,500 completed. Five more class records confirmed.
December 2014 : All blocks up to 222,280 completed. Three more class records confirmed.
November 2014 : All blocks up to 213,800 completed. Delay record 2255 and two more class records confirmed.
May 2014 : All blocks up to 203,920 completed. Three class records confirmed.
February 2014 : All blocks up to 194,060 completed. Five class records confirmed. All class records up to 2050 known.
November 2013 : All blocks up to 184,000 completed. Three more class records confirmed
June 2013 : All blocks up to 166,700 completed. Two more class records confirmed.
April 2013 : All blocks up to 165,200 completed. One more class record confirmed.
February 2013 : All blocks up to 160,740 completed. Six more class records confirmed.
November 2012 : All blocks up to 148,800 completed. Five more class records confirmed
May 2012 : All blocks up to 132,360 completed. Five class records confirmed.
January 2012 : All blocks up to 121,500 completed. Final missing class record below 2000 found.
December 2011 : All blocks up to 120,200 completed. One class record confirmed.
October 2011 : All blocks up to 117,000 completed. Three more class record confirmed.
July 2011 : All blocks up to 107,500 completed. Delay record 2254 and three class records confirmed.
April 2011 : All blocks up to 97,080 completed. Delay Record 2091 and two other class records confirmed.
November 2010 : All blocks up to 91,880 completed. Three class records confirmed.
August 2010 : All blocks up to 90,000 completed. Four more class records confirmed.
February 2010 : All blocks up to 82,700 completed. Two class records confirmed.
June 2009 : All blocks up to 76,160 completed. The lowest missing CR (1964) and one other confirmed.
April 2009 : All blocks up to 72,520 completed, passing 256. Three class records confirmed.
February 2009 : All blocks up to 71,020 completed. One more class record confirmed.
December 2008 : All blocks up to 69,740 completed. The lowest missing CR (1951) and two more confirmed.
November 2008 : All blocks up to 67,500 completed. Class record 2000 finally confirmed.
October 2008 : All blocks up to 66,380 completed. Four more class records confirmed.
May 2008 : All blocks up to 61,160 completed. The lowest missing CR (1925) and three others confirmed.
December 2007 : All blocks up to 58,600 completed. Four class records confirmed.
April 2007 : All blocks up to 54,540 completed. Five more class records confirmed.
October 2006 : All blocks up to 50,000 completed. Delay Record 2090 and five class records confirmed.
November 2005 : All blocks up to 46,100 completed. Double of Record 2045 confirmed as Delay Record 2046.
August 2005 : All blocks up to 45,040 completed. Five class records confirmed.
May 2005 : Delay Record of 2090 found at ±46,785 E+12 by Eric
February 2005 : All blocks up to 42,060 completed. Three more class record confirmed.
November 2004 : All blocks up to 40,000 completed. Four class records confirmed.
August 2004 : All blocks up to 37,500 completed. Another four class records confirmed.
May 2004 : All blocks up to 36,120 completed. Seven class records confirmed.
January 2004 : All blocks up to 31,960 completed. Five further class records confirmed.
November 2003 : All blocks up to 29,840 completed. One more class record confirmed.
August 2003 : All blocks up to 29,240 completed. Another fifteen class records confirmed.
April 2003 : All blocks up to 23,100 completed. Delay record 2045 and seven class records confirmed.
December 2002 : All blocks up to 20,100 completed. All class records below 1900 known.
November 2002 : All blocks up to 20,000 completed. Delay record 2042 and fourteen class records confirmed.
November 2002 : Delay Record of 2045 found at ±22,702 E+12 by Kevin
July 2002 : All blocks up to 16,460 completed. Delay record 2039 and fifteen class records confirmed.
April 2002 : All blocks up to 12,720 completed. Another fourteen class records confirmed.
March 2002 : Delay Record of 2042 found at ±17,026 E+12 by Michael
February 2002 : All blocks up to 9340 completed. Two more class records confirmed.
December 2001 : Delay Record of 2039 found at ±12,770 E+12 by Billy
November 2001 : All blocks up to 9020 completed. One Delay record and ten class records confirmed.
September 2001 : All blocks up to 6800 completed. Three Delay records and fourteen class records confirmed. 
August 2001 : All blocks up to 3600 completed. Two Delay records and five class records confirmed
June 2001 : Delay Record of 1958 found at ±7579 E+12 by Kevin
May 2001 : Delay Record of 1919 found at ±6482 E+12 by Kevin
April 2001 : Delay Record of 1916 found at ±4861 E+12 by Kevin
March 2001 : Delay Record of 1903 found at ±4320 E+12 by Kevin
March 2001 : Delay Record of 1895 found at ±3586 E+12 by Eric
March 2001 : Delay Record of 1874 found at ±2978 E+12 by Kevin
February 2001 : All blocks up to 2620 completed. Three class records confirmed.
January 2001 : New Class and Delay Record of 1871 found at 2234,047405,400065.

Range 2000-20000
completed (view)		Range 20000-40000
completed (view)		Range 40000-60000
completed (view)		Range 60000-80000
completed (view)		Range 80000-100000
completed (view)
Range 100000-120000
completed (view)		Range 120000-140000
completed (view)		Range 140000-160000
completed (view)		Range 160000-180000
completed (view)		Range 180000-200000
completed (view)
Range 200000-300000
completed (view)		Range 300000-400000
completed (view)		Range 400000-500000
completed (view)		Range 500000-600000
completed (view)		 
Not yet assigned Assigned,
not yet started		 Assigned,
in progress		 Entire interval
completed		 Interval completed
class record found
600000-100
Steven		 600100-200
Steven		 600200-300
Steven		 600300-400
Steven		 600400-500
Steven		 600500-600
Steven		 600600-700
Steven		 600700-800
Steven		 600800-900
Eric		 600900-000
Eric
601000-100
Eric		 601100-200
Eric		 601200-300
Eric		 601300-400
Eric		 601400-500
Teodor		 601500-600
Teodor		 601600-700
Eric		 601700-800
Eric		 601800-900
Daniel		 601900-000
Daniel
602000-100
Lutz		 602100-200
Lutz		 602200-300
Lutz		 602300-400
Lutz		 602400-500
Lutz		 602500-600
Lutz		 602600-700
Lutz		 602700-800
Lutz		 602800-900
Lutz		 602900-000
Lutz
603000-100
Lutz		 603100-200
Lutz		 603200-300
Lutz		 603300-400
Lutz		 603400-500
Lutz		 603500-600
Lutz		 603600-700
Lutz		 603700-800
Lutz		 603800-900
Lutz		 603900-000
Lutz
604000-100
Eric		 604100-200
George C		 604200-300
Chris:		 604300-400
Chris:		 604400-500
Luiz		 604500-600
Luiz		 604600-700
Luiz		 604700-800
Luiz		 604800-900
Daniel		 604900-000
Daniel
605000-100
Steven		 605100-200
Steven		 605200-300
Steven		 605300-400
Steven		 605400-500
Steven		 605500-600
Steven		 605600-700
Steven		 605700-800
Steven		 605800-900
Bob		 605900-000
Bob
606000-100
Kevin		 606100-200
Kevin		 606200-300
Kevin		 606300-400
Kevin		 606400-500
Kevin		 606500-600
Kevin		 606600-700
Kevin		 606700-800
Kevin		 606800-900
Kevin		 606900-000
Kevin
607000-100
Kevin		 607100-200
Kevin		 607200-300
Kevin		 607300-400
Kevin		 607400-500
Kevin		 607500-600
Kevin		 607600-700
Kevin		 607700-800
Kevin		 607800-900
Kevin		 607900-000
Kevin
608000-100
Kevin		 608100-200
Kevin		 608200-300
Kevin		 608300-400
Kevin		 608400-500
Kevin		 608500-600
Kevin		 608600-700
Kevin		 608700-800
Kevin		 608800-900
Kevin		 608900-000
Kevin
609000-100
Kevin		 609100-200
Kevin		 609200-300
Kevin		 609300-400
Kevin		 609400-500
Kevin		 609500-600
Kevin		 609600-700
Kevin		 609700-800
Kevin		 609800-900
Kevin		 609900-000
Kevin
610000-100
Wenjie		 610100-200
Wenjie		 610200-300
Wenjie		 610300-400
Wenjie		 610400-500
Wenjie		 610500-600
Wenjie		 610600-700
Wenjie		 610700-800
Wenjie		 610800-900
Wenjie		 610900-000
Wenjie
611000-100
Wenjie		 611100-200
Wenjie		 611200-300
Wenjie		 611300-400
Wenjie		 611400-500
Wenjie		 611500-600
Wenjie		 611600-700
Wenjie		 611700-800
Wenjie		 611800-900
Wenjie		 611900-000
Wenjie
612000-100
Wenjie		 612100-200
Wenjie		 612200-300
Wenjie		 612300-400
Wenjie		 612400-500
Wenjie		 612500-600
Wenjie		 612600-700
Wenjie		 612700-800
Wenjie		 612800-900
Wenjie		 612900-000
Wenjie
613000-100
Wenjie		 613100-200
Wenjie		 613200-300
Wenjie		 613300-400
Wenjie		 613400-500
Wenjie		 613500-600
Wenjie		 613600-700
Wenjie		 613700-800
Wenjie		 613800-900
Wenjie		 613900-000
Wenjie
614000-100
Wenjie		 614100-200
Wenjie		 614200-300
Wenjie		 614300-400
Wenjie		 614400-500
Wenjie		 614500-600
Wenjie		 614600-700
Wenjie		 614700-800
Wenjie		 614800-900
Wenjie		 614900-000
Wenjie
615000-100
Wenjie		 615100-200
Wenjie		 615200-300
Wenjie		 615300-400
Wenjie		 615400-500
Wenjie		 615500-600
Wenjie		 615600-700
Wenjie		 615700-800
Wenjie		 615800-900
Wenjie		 615900-000
Wenjie
616000-100
Wenjie		 616100-200
Wenjie		 616200-300
Wenjie		 616300-400
Wenjie		 616400-500
Wenjie		 616500-600
Wenjie		 616600-700
Wenjie		 616700-800
Wenjie		 616800-900
Wenjie		 616900-000
Wenjie
617000-100
Wenjie		 617100-200
Wenjie		 617200-300
Wenjie		 617300-400
Wenjie		 617400-500
Wenjie		 617500-600
Wenjie		 617600-700
Wenjie		 617700-800
Wenjie		 617800-900
Wenjie		 617900-000
Wenjie
618000-100
Wenjie		 618100-200
Wenjie		 618200-300
Wenjie		 618300-400
Wenjie		 618400-500
Wenjie		 618500-600
Wenjie		 618600-700
Wenjie		 618700-800
Wenjie		 618800-900
Wenjie		 618900-000
Wenjie
619000-100
Wenjie		 619100-200
Wenjie		 619200-300
Wenjie		 619300-400
Wenjie		 619400-500
Wenjie		 619500-600
Wenjie		 619600-700
Wenjie		 619700-800
Wenjie		 619800-900
Wenjie		 619900-000
Wenjie
620000-100
Kevin		 620100-200
Kevin		 620200-300
Kevin		 620300-400
Kevin		 620400-500
Kevin		 620500-600
Kevin		 620600-700
Kevin		 620700-800
Kevin		 620800-900
Kevin		 620900-000
Kevin
621000-100
Kevin		 621100-200
Kevin		 621200-300
Kevin		 621300-400
Kevin		 621400-500
Kevin		 621500-600
Kevin		 621600-700
Kevin		 621700-800
Kevin		 621800-900
Kevin		 621900-000
Kevin
622000-100
Kevin		 622100-200
Kevin		 622200-300
Kevin		 622300-400
Kevin		 622400-500
Kevin		 622500-600
Kevin		 622600-700
Kevin		 622700-800
Kevin		 622800-900
Kevin		 622900-000
Kevin
623000-100
Kevin		 623100-200
Kevin		 623200-300
Kevin		 623300-400
Kevin		 623400-500
Kevin		 623500-600
Kevin		 623600-700
Kevin		 623700-800
Kevin		 623800-900
Kevin		 623900-000
Kevin
624000-100
Kevin		 624100-200
Kevin		 624200-300
Kevin		 624300-400
Kevin		 624400-500
Kevin		 624500-600
Kevin		 624600-700
Kevin		 624700-800
Kevin		 624800-900
Kevin		 624900-000
Kevin
625000-100
Kevin		 625100-200
Kevin		 625200-300
Kevin		 625300-400
Kevin		 625400-500
Kevin		 625500-600
Kevin		 625600-700
Kevin		 625700-800
Kevin		 625800-900
Kevin		 625900-000
Kevin
626000-100
Kevin		 626100-200
Kevin		 626200-300
Kevin		 626300-400
Kevin		 626400-500
Kevin		 626500-600
Kevin		 626600-700
Kevin		 626700-800
Kevin		 626800-900
Kevin		 626900-000
Kevin
627000-100
Kevin		 627100-200
Kevin		 627200-300
Kevin		 627300-400
Kevin		 627400-500
Kevin		 627500-600
Kevin		 627600-700
Kevin		 627700-800
Kevin		 627800-900
Kevin		 627900-000
Kevin
628000-100
Kevin		 628100-200
Kevin		 628200-300
Kevin		 628300-400
Kevin		 628400-500
Kevin		 628500-600
Kevin		 628600-700
Kevin		 628700-800
Kevin		 628800-900
Kevin		 628900-000
Kevin
629000-100
Kevin		 629100-200
Kevin		 629200-300
Kevin		 629300-400
Kevin		 629400-500
Kevin		 629500-600
Kevin		 629600-700
Kevin		 629700-800
Kevin		 629800-900
Kevin		 629900-000
Kevin
630000-100
Kevin		 630100-200
Kevin		 630200-300
Kevin		 630300-400
Kevin		 630400-500
Kevin		 630500-600
Kevin		 630600-700
Kevin		 630700-800
Kevin		 630800-900
Kevin		 630900-000
Kevin
631000-100
Kevin		 631100-200
Kevin		 631200-300
Kevin		 631300-400
Kevin		 631400-500
Kevin		 631500-600
Kevin		 631600-700
Kevin		 631700-800
Kevin		 631800-900
Kevin		 631900-000
Kevin
632000-100
Kevin		 632100-200
Kevin		 632200-300
Kevin		 632300-400
Kevin		 632400-500
Kevin		 632500-600
Kevin		 632600-700
Kevin		 632700-800
Kevin		 632800-900
Kevin		 632900-000
Kevin
633000-100
Kevin		 633100-200
Kevin		 633200-300
Kevin		 633300-400
Kevin		 633400-500
Kevin		 633500-600
Kevin		 633600-700
Kevin		 633700-800
Kevin		 633800-900
Kevin		 633900-000
Kevin
634000-100
Kevin		 634100-200
Kevin		 634200-300
Kevin		 634300-400
Kevin		 634400-500
Kevin		 634500-600
Kevin		 634600-700
Kevin		 634700-800
Kevin		 634800-900
Kevin		 634900-000
Kevin
635000-100
Kevin		 635100-200
Kevin		 635200-300
Kevin		 635300-400
Kevin		 635400-500
Kevin		 635500-600
Kevin		 635600-700
Kevin		 635700-800
Kevin		 635800-900
Kevin		 635900-000
Kevin
636000-100
Kevin		 636100-200
Kevin		 636200-300
Kevin		 636300-400
Kevin		 636400-500
Kevin		 636500-600
Kevin		 636600-700
Kevin		 636700-800
Kevin		 636800-900
Kevin		 636900-000
Kevin
637000-100
Kevin		 637100-200
Kevin		 637200-300
Kevin		 637300-400
Kevin		 637400-500
Kevin		 637500-600
Kevin		 637600-700
Kevin		 637700-800
Kevin		 637800-900
Kevin		 637900-000
Kevin
638000-100
Kevin		 638100-200
Kevin		 638200-300
Kevin		 638300-400
Kevin		 638400-500
Kevin		 638500-600
Kevin		 638600-700
Kevin		 638700-800
Kevin		 638800-900
Kevin		 638900-000
Kevin
639000-100
Kevin		 639100-200
Kevin		 639200-300
Kevin		 639300-400
Kevin		 639400-500
Kevin		 639500-600
Kevin		 639600-700
Kevin		 639700-800
Kevin		 639800-900
Kevin		 639900-000
Kevin
640000-100
Kevin		 640100-200
Kevin		 640200-300
Kevin		 640300-400
Kevin		 640400-500
Kevin		 640500-600
Kevin		 640600-700
Kevin		 640700-800
Kevin		 640800-900
Kevin		 640900-000
Kevin
641000-100
Kevin		 641100-200
Kevin		 641200-300
Kevin		 641300-400
Kevin		 641400-500
Kevin		 641500-600
Kevin		 641600-700
Kevin		 641700-800
Kevin		 641800-900
Kevin		 641900-000
Kevin
642000-100
Kevin		 642100-200
Kevin		 642200-300
Kevin		 642300-400
Kevin		 642400-500
Kevin		 642500-600
Kevin		 642600-700
Kevin		 642700-800
Kevin		 642800-900
Kevin		 642900-000
Kevin
643000-100
Kevin		 643100-200
Kevin		 643200-300
Kevin		 643300-400
Kevin		 643400-500
Kevin		 643500-600
Kevin		 643600-700
Kevin		 643700-800
Kevin		 643800-900
Kevin		 643900-000
Kevin
644000-100
Kevin		 644100-200
Kevin		 644200-300
Kevin		 644300-400
Kevin		 644400-500
Kevin		 644500-600
Kevin		 644600-700
Kevin		 644700-800
Kevin		 644800-900
Kevin		 644900-000
Kevin
645000-100
Kevin		 645100-200
Kevin		 645200-300
Kevin		 645300-400
Kevin		 645400-500
Kevin		 645500-600
Kevin		 645600-700
Kevin		 645700-800
Kevin		 645800-900
Kevin		 645900-000
Kevin
646000-100
Kevin		 646100-200
Kevin		 646200-300
Kevin		 646300-400
Kevin		 646400-500
Kevin		 646500-600
Kevin		 646600-700
Kevin		 646700-800
Kevin		 646800-900
Kevin		 646900-000
Kevin
647000-100
Kevin		 647100-200
Kevin		 647200-300
Kevin		 647300-400
Kevin		 647400-500
Kevin		 647500-600
Kevin		 647600-700
Kevin		 647700-800
Kevin		 647800-900
Kevin		 647900-000
Kevin
648000-100
Kevin		 648100-200
Kevin		 648200-300
Kevin		 648300-400
Kevin		 648400-500
Kevin		 648500-600
Kevin		 648600-700
Kevin		 648700-800
Kevin		 648800-900
Kevin		 648900-000
Kevin
649000-100
Kevin		 649100-200
Kevin		 649200-300
Kevin		 649300-400
Kevin		 649400-500
Kevin		 649500-600
Kevin		 649600-700
Kevin		 649700-800
Kevin		 649800-900
Kevin		 649900-000
Kevin
650000-100
George C		 650100-200
Daniel		 650200-300
Daniel		 650300-400
George C		 650400-500
George C		 650500-600
George C		 650600-700
Luiz		 650700-800
Luiz		 650800-900
Luiz		 650900-000
Luiz
651000-100
Lutz		 651100-200
Lutz		 651200-300
Lutz		 651300-400
Lutz		 651400-500
Lutz		 651500-600
Lutz		 651600-700
Lutz		 651700-800
Lutz		 651800-900
Lutz		 651900-000
Lutz
652000-100
Lutz		 652100-200
Lutz		 652200-300
Lutz		 652300-400
Lutz		 652400-500
Lutz		 652500-600
Lutz		 652600-700
Lutz		 652700-800
Lutz		 652800-900
Lutz		 652900-000
Lutz
653000-100
 653100-200
 653200-300
 653300-400
 653400-500
 653500-600
 653600-700
 653700-800
 653800-900
 653900-000
654000-100
 654100-200
 654200-300
 654300-400
 654400-500
 654500-600
 654600-700
 654700-800
 654800-900
 654900-000
655000-100
Kevin		 655100-200
Kevin		 655200-300
Kevin		 655300-400
Kevin		 655400-500
Kevin		 655500-600
Kevin		 655600-700
Kevin		 655700-800
Kevin		 655800-900
Kevin		 655900-000
Kevin
656000-100
Kevin		 656100-200
Kevin		 656200-300
Kevin		 656300-400
Kevin		 656400-500
Kevin		 656500-600
Kevin		 656600-700
Kevin		 656700-800
Kevin		 656800-900
Kevin		 656900-000
Kevin
657000-100
Kevin		 657100-200
Kevin		 657200-300
Kevin		 657300-400
Kevin		 657400-500
Kevin		 657500-600
Kevin		 657600-700
Kevin		 657700-800
Kevin		 657800-900
Kevin		 657900-000
Kevin
658000-100
Kevin		 658100-200
Kevin		 658200-300
Kevin		 658300-400
Kevin		 658400-500
Kevin		 658500-600
Kevin		 658600-700
Kevin		 658700-800
Kevin		 658800-900
Kevin		 658900-000
Kevin
659000-100
Kevin		 659100-200
Kevin		 659200-300
Kevin		 659300-400
Kevin		 659400-500
Kevin		 659500-600
Kevin		 659600-700
Kevin		 659700-800
Kevin		 659800-900
Kevin		 659900-000
Kevin
660000-100
Kevin		 660100-200
Kevin		 660200-300
Kevin		 660300-400
Kevin		 660400-500
Kevin		 660500-600
Kevin		 660600-700
Kevin		 660700-800
Kevin		 660800-900
Kevin		 660900-000
Kevin
661000-100
Kevin		 661100-200
Kevin		 661200-300
Kevin		 661300-400
Kevin		 661400-500
Kevin		 661500-600
Kevin		 661600-700
Kevin		 661700-800
Kevin		 661800-900
Kevin		 661900-000
Kevin
662000-100
Kevin		 662100-200
Kevin		 662200-300
Kevin		 662300-400
Kevin		 662400-500
Kevin		 662500-600
Kevin		 662600-700
Kevin		 662700-800
Kevin		 662800-900
Kevin		 662900-000
Kevin
663000-100
Kevin		 663100-200
Kevin		 663200-300
Kevin		 663300-400
Kevin		 663400-500
Kevin		 663500-600
Kevin		 663600-700
Kevin		 663700-800
Kevin		 663800-900
Kevin		 663900-000
Kevin
664000-100
Kevin		 664100-200
Kevin		 664200-300
Kevin		 664300-400
Kevin		 664400-500
Kevin		 664500-600
Kevin		 664600-700
Kevin		 664700-800
Kevin		 664800-900
Kevin		 664900-000
Kevin
665000-100
Kevin		 665100-200
Kevin		 665200-300
Kevin		 665300-400
Kevin		 665400-500
Kevin		 665500-600
Kevin		 665600-700
Kevin		 665700-800
Kevin		 665800-900
Kevin		 665900-000
Kevin
666000-100
Kevin		 666100-200
Kevin		 666200-300
Kevin		 666300-400
Kevin		 666400-500
Kevin		 666500-600
Kevin		 666600-700
Kevin		 666700-800
Kevin		 666800-900
Kevin		 666900-000
Kevin
667000-100
Kevin		 667100-200
Kevin		 667200-300
Kevin		 667300-400
Kevin		 667400-500
Kevin		 667500-600
Kevin		 667600-700
Kevin		 667700-800
Kevin		 667800-900
Kevin		 667900-000
Kevin
668000-100
Kevin		 668100-200
Kevin		 668200-300
Kevin		 668300-400
Kevin		 668400-500
Kevin		 668500-600
Kevin		 668600-700
Kevin		 668700-800
Kevin		 668800-900
Kevin		 668900-000
Kevin
669000-100
Kevin		 669100-200
Kevin		 669200-300
Kevin		 669300-400
Kevin		 669400-500
Kevin		 669500-600
Kevin		 669600-700
Kevin		 669700-800
Kevin		 669800-900
Kevin		 669900-000
Kevin
670000-100
Kevin		 670100-200
Kevin		 670200-300
Kevin		 670300-400
Kevin		 670400-500
Kevin		 670500-600
Kevin		 670600-700
Kevin		 670700-800
Kevin		 670800-900
Kevin		 670900-000
Kevin
671000-100
Kevin		 671100-200
Kevin		 671200-300
Kevin		 671300-400
Kevin		 671400-500
Kevin		 671500-600
Kevin		 671600-700
Kevin		 671700-800
Kevin		 671800-900
Kevin		 671900-000
Kevin
672000-100
Kevin		 672100-200
Kevin		 672200-300
Kevin		 672300-400
Kevin		 672400-500
Kevin		 672500-600
Kevin		 672600-700
Kevin		 672700-800
Kevin		 672800-900
Kevin		 672900-000
Kevin
673000-100
Kevin		 673100-200
Kevin		 673200-300
Kevin		 673300-400
Kevin		 673400-500
Kevin		 673500-600
Kevin		 673600-700
Kevin		 673700-800
Kevin		 673800-900
Kevin		 673900-000
Kevin
674000-100
Kevin		 674100-200
Kevin		 674200-300
Kevin		 674300-400
Kevin		 674400-500
Kevin		 674500-600
Kevin		 674600-700
Kevin		 674700-800
Kevin		 674800-900
Kevin		 674900-000
Kevin
675000-100
Kevin		 675100-200
Kevin		 675200-300
Kevin		 675300-400
Kevin		 675400-500
Kevin		 675500-600
Kevin		 675600-700
Kevin		 675700-800
Kevin		 675800-900
Kevin		 675900-000
Kevin
676000-100
Kevin		 676100-200
Kevin		 676200-300
Kevin		 676300-400
Kevin		 676400-500
Kevin		 676500-600
Kevin		 676600-700
Kevin		 676700-800
Kevin		 676800-900
Kevin		 676900-000
Kevin
677000-100
Kevin		 677100-200
Kevin		 677200-300
Kevin		 677300-400
Kevin		 677400-500
Kevin		 677500-600
Kevin		 677600-700
Kevin		 677700-800
Kevin		 677800-900
Kevin		 677900-000
Kevin
678000-100
Kevin		 678100-200
Kevin		 678200-300
Kevin		 678300-400
Kevin		 678400-500
Kevin		 678500-600
Kevin		 678600-700
Kevin		 678700-800
Kevin		 678800-900
Kevin		 678900-000
Kevin
679000-100
Kevin		 679100-200
Kevin		 679200-300
Kevin		 679300-400
Kevin		 679400-500
Kevin		 679500-600
Kevin		 679600-700
Kevin		 679700-800
Kevin		 679800-900
Kevin		 679900-000
Kevin
680000-100
Kevin		 680100-200
Kevin		 680200-300
Kevin		 680300-400
Kevin		 680400-500
Kevin		 680500-600
Kevin		 680600-700
Kevin		 680700-800
Kevin		 680800-900
Kevin		 680900-000
Kevin
681000-100
Kevin		 681100-200
Kevin		 681200-300
Kevin		 681300-400
Kevin		 681400-500
Kevin		 681500-600
Kevin		 681600-700
Kevin		 681700-800
Kevin		 681800-900
Kevin		 681900-000
Kevin
682000-100
Kevin		 682100-200
Kevin		 682200-300
Kevin		 682300-400
Kevin		 682400-500
Kevin		 682500-600
Kevin		 682600-700
Kevin		 682700-800
Kevin		 682800-900
Kevin		 682900-000
Kevin
683000-100
Kevin		 683100-200
Kevin		 683200-300
Kevin		 683300-400
Kevin		 683400-500
Kevin		 683500-600
Kevin		 683600-700
Kevin		 683700-800
Kevin		 683800-900
Kevin		 683900-000
Kevin
684000-100
Kevin		 684100-200
Kevin		 684200-300
Kevin		 684300-400
Kevin		 684400-500
Kevin		 684500-600
Kevin		 684600-700
Kevin		 684700-800
Kevin		 684800-900
Kevin		 684900-000
Kevin
685000-100
Kevin		 685100-200
Kevin		 685200-300
Kevin		 685300-400
Kevin		 685400-500
Kevin		 685500-600
Kevin		 685600-700
Kevin		 685700-800
Kevin		 685800-900
Kevin		 685900-000
Kevin
686000-100
Kevin		 686100-200
Kevin		 686200-300
Kevin		 686300-400
Kevin		 686400-500
Kevin		 686500-600
Kevin		 686600-700
Kevin		 686700-800
Kevin		 686800-900
Kevin		 686900-000
Kevin
687000-100
Kevin		 687100-200
Kevin		 687200-300
Kevin		 687300-400
Kevin		 687400-500
Kevin		 687500-600
Kevin		 687600-700
Kevin		 687700-800
Kevin		 687800-900
Kevin		 687900-000
Kevin
688000-100
Kevin		 688100-200
Kevin		 688200-300
Kevin		 688300-400
Kevin		 688400-500
Kevin		 688500-600
Kevin		 688600-700
Kevin		 688700-800
Kevin		 688800-900
Kevin		 688900-000
Kevin
689000-100
Kevin		 689100-200
Kevin		 689200-300
Kevin		 689300-400
Kevin		 689400-500
Kevin		 689500-600
Kevin		 689600-700
Kevin		 689700-800
Kevin		 689800-900
Kevin		 689900-000
Kevin
690000-100
Kevin		 690100-200
Kevin		 690200-300
Kevin		 690300-400
Kevin		 690400-500
Kevin		 690500-600
Kevin		 690600-700
Kevin		 690700-800
Kevin		 690800-900
Kevin		 690900-000
Kevin
691000-100
Kevin		 691100-200
Kevin		 691200-300
Kevin		 691300-400
Kevin		 691400-500
Kevin		 691500-600
Kevin		 691600-700
Kevin		 691700-800
Kevin		 691800-900
Kevin		 691900-000
Kevin
692000-100
Kevin		 692100-200
Kevin		 692200-300
Kevin		 692300-400
Kevin		 692400-500
Kevin		 692500-600
Kevin		 692600-700
Kevin		 692700-800
Kevin		 692800-900
Kevin		 692900-000
Kevin
693000-100
Kevin		 693100-200
Kevin		 693200-300
Kevin		 693300-400
Kevin		 693400-500
Kevin		 693500-600
Kevin		 693600-700
Kevin		 693700-800
Kevin		 693800-900
Kevin		 693900-000
Kevin
694000-100
Kevin		 694100-200
Kevin		 694200-300
Kevin		 694300-400
Kevin		 694400-500
Kevin		 694500-600
Kevin		 694600-700
Kevin		 694700-800
Kevin		 694800-900
Kevin		 694900-000
Kevin
695000-100
Kevin		 695100-200
Kevin		 695200-300
Kevin		 695300-400
Kevin		 695400-500
Kevin		 695500-600
Kevin		 695600-700
Kevin		 695700-800
Kevin		 695800-900
Kevin		 695900-000
Kevin
696000-100
Kevin		 696100-200
Kevin		 696200-300
Kevin		 696300-400
Kevin		 696400-500
Kevin		 696500-600
Kevin		 696600-700
Kevin		 696700-800
Kevin		 696800-900
Kevin		 696900-000
Kevin
697000-100
Kevin		 697100-200
Kevin		 697200-300
Kevin		 697300-400
Kevin		 697400-500
Kevin		 697500-600
Kevin		 697600-700
Kevin		 697700-800
Kevin		 697800-900
Kevin		 697900-000
Kevin
698000-100
Kevin		 698100-200
Kevin		 698200-300
Kevin		 698300-400
Kevin		 698400-500
Kevin		 698500-600
Kevin		 698600-700
Kevin		 698700-800
Kevin		 698800-900
Kevin		 698900-000
Kevin
699000-100
Kevin		 699100-200
Kevin		 699200-300
Kevin		 699300-400
Kevin		 699400-500
Kevin		 699500-600
Kevin		 699600-700
Kevin		 699700-800
Kevin		 699800-900
Kevin		 699900-000
Kevin
700000-100
 700100-200
 700200-300
 700300-400
 700400-500
 700500-600
 700600-700
 700700-800
 700800-900
 700900-000
Contributions by
EricEric Roosendaal, Netherlands (author) LutzLutz Nebe, Germany
KevinKevin Hebb, Alberta, Canada BobBob Coffman, USA
WenjieFang Wenjie, China StevenSteven Cuthbert, England
LuizLuiz Antonio Souza, Brazil Chris:Christopher Peace, UK
TeodorTeodor Baev DanielDaniel Podobinski
George CGeorge C   

Back to the general 3x+1 page.