# Twin Prime Curta

A twin prime is a prime number which is separated from another prime number by only two counts.

This page lists the first of each pair of twin prime numbers up to 89897, and also above 500000 up to 589859. Use this list to check whether your Curta happens to have a twin prime number for its serial number.

This list is from: http://primes.utm.edu/lists/small/10ktwins.txt

Only the first (lower) of each pair of the twin primes is listed.

By adding 2 to each number in this list you arrive at the higher of the twin prime pair. If your Curta has a serial number that is on this list then that number is the lower of a pair of twin prime set. If your Curta has a serial number that is two counts higher than one of the numbers in this list then it has a serial number that is the higher of a twin prime set.

So, as an example, the number 11 has a twin prime 13. The numbers 11 and 13 are a twin primes set. The numbers 17 and 19 are another twin prime set. Likewise, the numbers 3 and 5 are also a twin prime set. The reason the number 5 is on the list is because it, too, has its own higher twin prime...the number 7.

For a list of all prime numbers (both "regular" and twin primes) within the serial number range of the Curtas see PrimeNumberCurta.

TYPE I

```       3       5      11      17      29      41      59      71     101
107     137     149     179     191     197     227     239     269
281     311     347     419     431     461     521     569     599
617     641     659     809     821     827     857     881    1019
1031    1049    1061    1091    1151    1229    1277    1289    1301
1319    1427    1451    1481    1487    1607    1619    1667    1697
1721    1787    1871    1877    1931    1949    1997    2027    2081
2087    2111    2129    2141    2237    2267    2309    2339    2381
2549    2591    2657    2687    2711    2729    2789    2801    2969
2999    3119    3167    3251    3257    3299    3329    3359    3371
3389    3461    3467    3527    3539    3557    3581    3671    3767
3821    3851    3917    3929    4001    4019    4049    4091    4127
4157    4217    4229    4241    4259    4271    4337    4421    4481
4517    4547    4637    4649    4721    4787    4799    4931    4967
5009    5021    5099    5231    5279    5417    5441    5477    5501
5519    5639    5651    5657    5741    5849    5867    5879    6089
6131    6197    6269    6299    6359    6449    6551    6569    6659
6689    6701    6761    6779    6791    6827    6869    6947    6959
7127    7211    7307    7331    7349    7457    7487    7547    7559
7589    7757    7877    7949    8009    8087    8219    8231    8291
8387    8429    8537    8597    8627    8819    8837    8861    8969
8999    9011    9041    9239    9281    9341    9419    9431    9437
9461    9629    9677    9719    9767    9857    9929   10007   10037
10067   10091   10139   10271   10301   10331   10427   10457   10499
10529   10709   10859   10889   10937   11057   11069   11117   11159
11171   11351   11489   11549   11699   11717   11777   11831   11939
11969   12041   12071   12107   12161   12239   12251   12377   12539
12611   12821   12917   13001   13007   13217   13337   13397   13679
13691   13709   13721   13757   13829   13877   13901   13931   13997
14009   14081   14249   14321   14387   14447   14549   14561   14591
14627   14867   15137   15269   15287   15329   15359   15581   15641
15647   15731   15737   15887   15971   16061   16067   16139   16187
16229   16361   16451   16631   16649   16691   16829   16901   16979
17027   17189   17207   17291   17387   17417   17489   17579   17597
17657   17681   17747   17789   17837   17909   17921   17957   17987
18041   18047   18059   18119   18131   18251   18287   18311   18521
18539   18911   18917   19079   19139   19181   19211   19379   19421
19427   19469   19541   19697   19751   19841   19889   19961   19991
20021   20147   20231   20357   20441   20477   20507   20549   20639
20717   20747   20771   20807   20897   20981   21011   21017   21059
21191   21317   21377   21491   21521   21557   21587   21599   21611
21647   21737   21839   22037   22091   22109   22157   22271   22277
22367   22481   22541   22571   22619   22637   22697   22739   22859
22961   23027   23039   23057   23201   23291   23369   23537   23561
23627   23669   23687   23741   23831   23909   24107   24179   24371
24419   24917   24977   25031   25169   25301   25307   25409   25469
25577   25601   25799   25847   25931   25997   26111   26249   26261
26681   26699   26711   26729   26861   26879   26891   26951   27059
27107   27239   27281   27407   27479   27527   27539   27581   27689
27737   27749   27791   27917   27941   28097   28109   28181   28277
28307   28349   28409   28547   28571   28619   28661   28751   29021
29129   29207   29387   29399   29567   29669   29759   29879   30011
30089   30137   30269   30389   30467   30491   30557   30839   30851
30869   31079   31121   31151   31181   31247   31319   31391   31511
31541   31721   31727   31769   31847   32027   32057   32117   32141
32189   32297   32321   32369   32411   32441   32531   32561   32609
32717   32801   32831   32909   32939   32969   33071   33149   33179
33287   33329   33347   33587   33599   33617   33749   33767   33809
33827   34031   34127   34157   34211   34259   34301   34367   34469
34499   34511   34589   34649   34757   34841   34847   34961   35051
35081   35279   35447   35507   35531   35591   35729   35801   35837
35897   36011   36107   36341   36467   36527   36779   36791   36899
36929   37019   37199   37307   37337   37361   37547   37571   37589
37691   37781   37811   37991   38237   38327   38447   38459   38567
38609   38651   38669   38711   38747   38921   39041   39161   39227
39239   39341   39371   39509   39827   39839   40037   40127   40151
40427   40529   40637   40697   40847   41141   41177   41201   41231
41387   41411   41519   41609   41759   41849   41957   41981   42017
42071   42179   42221   42281   42407   42461   42569   42641   42701
42839   42899   43049   43319   43397   43541   43577   43607   43649
43781   43787   43889   43961   44027   44087   44129   44201   44267
44279   44381   44531   44621   44699   44771   45119   45137   45179
45317   45341   45587   45821   46049   46091   46181   46271   46307
46349   46439   46589   46679   46769   46817   46829   47057   47147
47351   47387   47417   47657   47699   47711   47741   47777   47807
48119   48311   48407   48479   48539   48647   48677   48731   48779
48821   48857   48869   48989   49031   49121   49169   49199   49277
49331   49367   49391   49409   49529   49547   49667   49739   49787
49919   49937   49991   50021   50051   50129   50261   50459   50549
50591   50891   50969   51059   51131   51197   51239   51341   51347
51419   51437   51479   51719   51767   51827   51869   51971   52067
52181   52289   52361   52541   52709   52859   52901   53087   53147
53171   53231   53267   53279   53549   53591   53609   53717   53897
54011   54401   54419   54497   54539   54581   54629   54917   55049
55217   55331   55337   55439   55619   55631   55661   55817   55901
55931   56039   56099   56207   56237   56267   56477   56501   56531
56597   56711   56807   56891   56909   56921   57191   57221   57269
57329   57347   57527   57557   57791   57899   58109   58151   58169
58229   58367   58391   58439   58451   58601   58787   58907   59009
59021   59051   59207   59219   59357   59417   59441   59471   59627
59669   60089   60101   60167   60257   60647   60659   60761   60887
60899   60917   61151   61331   61379   61469   61559   61979   62129
62141   62189   62297   62927   62969   62981   62987   63029   63197
63311   63389   63419   63587   63599   63647   63689   63839   64151
64187   64301   64451   64577   64661   64781   64877   64919   65027
65099   65171   65267   65447   65519   65537   65579   65699   65717
65729   65837   65927   65981   66107   66359   66569   66749   66851
66947   67139   67187   67211   67217   67271   67409   67427   67577
67757   67931   68111   68207   68279   68447   68489   68711   68819
68879   68897   69029   69149   69191   69257   69401   69491   69497
69737   69761   69827   69857   69929   70001   70121   70139   70181
70199   70379   70457   70487   70571   70619   70841   70877   70919
70949   70979   70997   71261   71327   71339   71387   71411   71471
71549   71711   71807   71879   72089   72101   72167   72221   72227
72251   72269   72467   72647   72671   72869   73037   73061   73361
73607   73679   73847   74099   74159   74201   74381   74411   74507
74609   74717   74729   74759   75011   75167   75209   75389   75401
75539   75617   75707   75989   76001   76079   76157   76259   76367
76421   76541   76649   76829   76871   76961   77237   77261   77267
77417   77477   77489   77549   77687   77711   78137   78191   78437
78509   78539   78569   78779   78887   78977   79151   79229   79397
79559   79631   79691   79697   79811   79841   79901   79997   80147
80207   80231   80447   80471   80489   80627   80669   80681   80747
80777   80831   80909   81017   81041   81047   81197   81281   81371
81551   81647   81701   81899   81929   81971   82007   82037   82139
82217   82349   82469   82529   82559   82721   82727   82757   82811
82889   83219   83231   83267   83339   83399   83561   83639   83717
84059   84179   84221   84317   84347   84389   84521   84629   84809
84857   84869   84977   85091   85199   85331   85361   85427   85451
85619   85667   85817   85829   85931   86027   86111   86291   86351
86369   86531   86627   86927   87011   87119   87149   87179   87221
87251   87509   87539   87557   87587   87629   87641   87719   87959
88001   88259   88337   88469   88589   88607   88661   88799   88811
88817   89069   89519   89561   89597   89657   89669   89819   89897

```

TYPE II

```                  500111  500177  500231  500237  500471  500807  500909
500921  501029  501131  501341  501701  501827  502079  502259  502499
502631  502769  502919  503231  503381  503549  503609  503621  503777
503819  503927  504149  504377  504521  504617  504797  504851  504989
505031  505049  505157  505277  505319  505367  505409  505511  505691
505709  506171  506327  506459  506531  506591  506687  506729  507077
507137  507149  507347  507359  507497  507779  507917  508019  508271
508577  508619  508901  509147  509687  509909  510047  510077  510401
510449  510551  510581  510611  510617  510707  510941  511109  511151
511169  511211  511631  511961  512009  512249  512579  512591  512711
512819  512927  512999  513101  513167  513311  513479  513509  513767
513839  514049  514079  514247  514529  514637  514649  514739  515087
515231  515369  515651  515771  516161  516251  516359  516431  516539
516587  516617  516947  516977  517079  517241  517457  517469  517499
517511  517547  517637  518057  518099  518129  518207  518237  518387
518429  518471  518741  518759  518801  518807  518981  519089  519119
519227  519371  519521  519551  519917  520019  520307  520361  520379
520409  520547  520607  520631  520967  521021  521039  521177  521357
521399  521537  521657  521669  521789  521879  522059  522227  522281
522371  522521  522659  522677  522761  522827  522881  522959  523349
523487  523541  523571  523637  523667  524201  524219  524351  524387
524411  524507  524519  524591  524681  524801  524939  524957  524969
524981  524999  525191  525359  525377  525431  525491  525869  525947
526049  526067  526157  526289  526499  526571  526649  526679  526739
526829  527069  527159  527207  527699  527981  528041  528401  528509
528629  528707  528821  528881  528971  529049  529127  529181  529271
529421  529517  529577  529691  529811  529979  530249  530531  530597
530711  530741  531101  531569  531611  531821  532331  532451  532529
532601  532619  532781  532949  533009  533051  533189  533261  533711
533969  534047  534629  534647  534659  534839  535349  535487  535571
535607  535859  535937  536057  536099  536147  536189  536279  536441
536447  536531  536561  536717  536771  536777  536801  536867  536999
537401  538049  538121  538157  538199  538247  538301  538331  538397
538511  538649  538709  538721  538799  539111  539267  539309  539321
539447  539501  539507  539639  539711  539837  539897  540119  540179
540269  540347  540389  540509  540539  540557  540611  540677  540689
540779  541361  541529  541547  541577  541991  542021  542081  542117
542261  542537  542921  543017  543161  543287  543311  543551  543659
543791  543857  543887  544007  544097  544277  544721  544757  544877
544961  545087  545141  545549  545747  545789  546017  546101  546149
546239  546617  547271  547361  547397  547499  547661  547817  548459
548501  548519  548831  549011  549089  549161  549167  549257  549509
549551  549587  549641  549737  549749  549977  550007  550061  550127
550211  550439  550469  550607  550661  550811  550841  550859  550937
551231  551651  551729  551909  552029  552089  552239  552401  552491
552581  552707  552749  552791  553097  553139  553277  553589  553757
553919  553961  554087  554207  554417  554639  554789  554837  554891
555041  555251  555419  555521  555827  556067  556271  556607  556691
556817  556859  557057  557369  557519  557729  557741  557759  557801
557861  558251  558287  558497  558539  558791  558827  559049  559211
559217  559367  559511  559547  559631  560081  560171  560237  560297
560477  560489  560501  560639  560891  560939  561059  561101  561551
562019  562271  562349  562517  562577  562589  562631  562691  563009
563039  563117  563357  563411  563417  563447  563501  564059  564227
564269  564299  564371  564407  564701  564917  565109  565259  565379
565391  565427  565517  565769  565889  565907  565919  566231  566429
566441  566537  566549  566717  567011  567179  567449  567527  567659
567881  567947  568151  568187  568439  569081  569159  569249  569267
569321  569417  569579  569711  569729  569771  570041  570047  570077
570107  570389  570419  570461  570497  570509  570527  570839  570851
570959  571199  571229  571397  571601  571799  571871  572051  572177
572321  572417  572519  572597  572651  572657  572879  572939  573107
573161  573341  573479  573509  573569  573737  573761  573899  574031
574157  574181  574307  574619  574799  574967  575129  575249  575369
575429  575579  575591  575921  575957  576029  576221  576377  576551
576647  576701  576881  577007  577067  577151  577331  577349  577397
577529  577637  577937  577979  578297  578309  578399  578687  578777
578819  578957  579197  579281  579407  579497  579539  579569  579611
579641  579881  579947  580031  580079  580301  580379  580631  580691
580757  580889  581069  581099  581171  581237  581261  581351  581549
581597  581699  581729  581981  582011  582137  582221  582317  582509
582689  582719  582761  582851  582971  583019  583169  583337  583619
583859  584279  584357  584471  584789  585041  585071  585269  585839
585881  585911  585917  586121  586361  586457  586499  586541  586601
586631  586811  586919  586979  587051  587267  587549  587621  587747
587771  587969  587987  588167  588239  588359  588569  588647  588947
589109  589187  589241  589289  589451  589529  589607  589751  589859

```

Edit Text of this page (last edited March 3, 2020 by c-98-223-158-4.hsd1.il.comcast.net)
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