Chen primes up to 640214

Chen primes: A prime number p is called a Chen prime if p + 2 is either a prime or semiprime.

There is 1000 chen primes smaller than 640214.

Checkout chen primes up to: 100, 500, 1000, 10000.

List#

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 47, 53, 59, 67, 71, 83, 89, 101, 107, 109, 113, 127, 131, 137, 139, 149, 157, 167, 179, 181, 191, 197, 199, 211, 227, 233, 239, 251, 257, 263, 269, 281, 293, 307, 311, 317, 337, 347, 353, 359, 379, 389, 401, 409, 419, 431, 443, 449, 461, 467, 479, 487, 491, 499, 503, 509, 521, 541, 557, 563, 569, 571, 577, 587, 599, 617, 631, 641, 647, 653, 659, 677, 683, 701, 719, 743, 751, 761, 769, 787, 797, 809, 811, 821, 827, 829, 839, 857, 863, 877, 881, 887, 911, 919, 937, 941, 947, 953, 971, 977, 983, 991, 1009, 1019, 1031, 1039, 1049, 1061, 1091, 1097, 1109, 1117, 1151, 1163, 1187, 1193, 1201, 1217, 1229, 1259, 1277, 1283, 1289, 1291, 1297, 1301, 1319, 1327, 1361, 1367, 1381, 1399, 1409, 1427, 1439, 1451, 1459, 1471, 1481, 1487, 1499, 1511, 1553, 1559, 1567, 1583, 1601, 1607, 1619, 1621, 1637, 1667, 1669, 1697, 1709, 1721, 1733, 1759, 1777, 1787, 1801, 1847, 1871, 1877, 1889, 1901, 1907, 1913, 1931, 1949, 1979, 1997, 2003, 2017, 2027, 2029, 2039, 2069, 2081, 2087, 2099, 2111, 2129, 2141, 2153, 2179, 2207, 2213, 2237, 2243, 2251, 2267, 2269, 2281, 2309, 2333, 2339, 2351, 2357, 2381, 2389, 2393, 2411, 2417, 2441, 2447, 2459, 2467, 2477, 2531, 2543, 2549, 2557, 2579, 2591, 2609, 2621, 2647, 2657, 2659, 2687, 2699, 2711, 2719, 2729, 2731, 2741, 2777, 2789, 2801, 2837, 2843, 2857, 2861, 2879, 2897, 2909, 2927, 2939, 2957, 2963, 2969, 2971, 2999, 3011, 3037, 3041, 3061, 3083, 3089, 3119, 3137, 3167, 3181, 3187, 3191, 3203, 3221, 3251, 3257, 3259, 3271, 3299, 3307, 3329, 3347, 3359, 3371, 3389, 3407, 3413, 3457, 3461, 3467, 3491, 3511, 3527, 3539, 3541, 3557, 3559, 3581, 3593, 3637, 3659, 3671, 3677, 3691, 3709, 3719, 3761, 3767, 3779, 3797, 3803, 3821, 3847, 3851, 3863, 3881, 3889, 3907, 3917, 3919, 3929, 3947, 3989, 4001, 4007, 4019, 4049, 4091, 4099, 4127, 4133, 4139, 4157, 4211, 4217, 4229, 4241, 4259, 4271, 4283, 4289, 4297, 4337, 4339, 4349, 4357, 4391, 4397, 4409, 4421, 4441, 4447, 4451, 4481, 4517, 4547, 4567, 4591, 4637, 4643, 4649, 4657, 4679, 4703, 4721, 4733, 4787, 4789, 4799, 4801, 4817, 4861, 4871, 4889, 4909, 4931, 4937, 4967, 4969, 4987, 4999, 5009, 5021, 5039, 5051, 5077, 5087, 5099, 5147, 5153, 5167, 5171, 5189, 5197, 5231, 5261, 5279, 5297, 5303, 5309, 5347, 5351, 5381, 5387, 5399, 5417, 5431, 5441, 5471, 5477, 5483, 5501, 5507, 5519, 5531, 5581, 5639, 5651, 5657, 5669, 5701, 5711, 5737, 5741, 5791, 5801, 5807, 5813, 5849, 5851, 5867, 5879, 5897, 5903, 5939, 5981, 5987, 6007, 6011, 6029, 6047, 6079, 6089, 6101, 6113, 6131, 6143, 6197, 6247, 6257, 6269, 6287, 6299, 6311, 6317, 6329, 6337, 6359, 6421, 6427, 6449, 6481, 6491, 6521, 6551, 6569, 6581, 6607, 6619, 6637, 6659, 6661, 6689, 6701, 6709, 6737, 6761, 6779, 6791, 6803, 6827, 6833, 6841, 6863, 6869, 6899, 6911, 6947, 6959, 6971, 6977, 6997, 7001, 7039, 7043, 7069, 7079, 7109, 7121, 7127, 7129, 7151, 7177, 7193, 7211, 7229, 7247, 7253, 7307, 7309, 7321, 7331, 7349, 7417, 7433, 7451, 7457, 7481, 7487, 7499, 7507, 7517, 7529, 7541, 7547, 7559, 7561, 7589, 7591, 7607, 7649, 7669, 7727, 7757, 7793, 7817, 7829, 7853, 7877, 7901, 7907, 7919, 7937, 7949, 8009, 8011, 8059, 8069, 8081, 8087, 8093, 8117, 8147, 8171, 8191, 8219, 8221, 8231, 8291, 8297, 8329, 8369, 8387, 8389, 8429, 8501, 8527, 8537, 8543, 8581, 8597, 8609, 8627, 8663, 8681, 8689, 8707, 8741, 8747, 8779, 8807, 8819, 8837, 8849, 8861, 8887, 8933, 8951, 8969, 8999, 9001, 9011, 9029, 9041, 9067, 9109, 9181, 9199, 9209, 9221, 9227, 9239, 9257, 9281, 9311, 9341, 9377, 9419, 9431, 9437, 9461, 9467, 9479, 9491, 9521, 9533, 9551, 9587, 9629, 9649, 9661, 9677, 9689, 9719, 9743, 9767, 9769, 9791, 9811, 9839, 9851, 9857, 9901, 9929, 9941, 9967, 10007, 10037, 10039, 10061, 10067, 10079, 10091, 10111, 10133, 10139, 10169, 10181, 10193, 10211, 10247, 10259, 10271, 10289, 10301, 10313, 10331, 10343, 10369, 10391, 10399, 10427, 10433, 10457, 10487, 10499, 10529, 10531, 10559, 10597, 10601, 10607, 10639, 10667, 10709, 10711, 10739, 10781, 10799, 10837, 10847, 10859, 10867, 10889, 10891, 10909, 10937, 10949, 10979, 11027, 11057, 11069, 11071, 11087, 11117, 11159, 11171, 11177, 11197, 11213, 11261, 11279, 11299, 11351, 11369, 11399, 11411, 11447, 11467, 11483, 11489, 11497, 11519, 11549, 11551, 11579, 11587, 11597, 11621, 11657, 11681, 11699, 11717, 11719, 11731, 11777, 11783, 11789, 11827, 11831, 11839, 11897, 11903, 11909, 11927, 11939, 11969, 11981, 11987, 12007, 12011, 12037, 12041, 12071, 12107, 12113, 12149, 12161, 12197, 12203, 12227, 12239, 12251, 12269, 12277, 12281, 12347, 12377, 12379, 12401, 12437, 12457, 12479, 12497, 12539, 12569, 12601, 12611, 12641, 12653, 12659, 12713, 12721, 12743, 12757, 12781, 12791, 12809, 12821, 12889, 12893, 12911, 12917, 12953, 12959, 12979, 13001, 13007, 13009, 13043, 13049, 13103, 13109, 13121, 13127, 13151, 13163, 13171, 13217, 13229, 13259, 13267, 13313, 13331, 13337, 13339, 13367, 13397, 13421, 13441, 13451, 13457, 13463, 13469, 13477, 13499, 13537, 13553, 13567, 13577, 13619, 13679, 13681, 13691, 13709, 13721, 13751, 13757, 13763, 13789, 13799, 13807, 13829, 13841, 13859, 13877, 13883, 13901, 13907, 13931, 13967, 13997, 14009, 14057, 14071, 14081, 14087, 14107, 14177, 14197, 14207, 14249, 14251, 14303, 14321, 14347, 14369, 14387, 14401, 14437, 14447, 14449, 14489, 14519, 14543, 14549, 14561, 14591, 14621, 14627, 14629, 14633, 14657, 14669, 14699, 14717, 14741, 14759, 14783, 14797, 14813, 14827, 14843, 14851, 14867, 14869, 14879, 14891, 14897, 14939, 14951, 14957, 14969, 15017, 15031, 15053, 15061, 15077, 15101, 15107, 15131, 15137, 15149, 15161, 15227, 15241, 15259, 15269, 15287, 15319, 15329, 15359, 15401, 15413, 15439, 15443, 15467, 15497, 15511, 15527, 15551, 15569, 15581, 15641, 15647, 15671, 15679, 15683, 15731, 15737, 15749, 15761, 15767, 15791, 15809, 15817, 15881, 15887, 15889, 15907, 15959, 15971, 16001, 16007, 16061, 16067, 16097, 16103, 16127, 16139, 16141, 16187, 16229, 16249, 16253, 16319, 16349, 16361, 16411, 16421, 16427, 16447, 16451, 16481, 16487, 16493, 16519, 16529, 16561, 16607, 16619, 16631, 16649, 16661, 16691, 16741, 16787, 16829, 16871, 16901, 16921, 16937, 16943, 16979, 17021, 17027, 17033, 17047, 17077, 17159, 17189, 17207, 17209, 17231, 17291, 17321, 17333, 17387, 17401, 17417, 17419, 17471, 17489

Table#

 12345678910
1 - 102357111317192329
11 - 2031374147535967718389
21 - 30101107109113127131137139149157
31 - 40167179181191197199211227233239
41 - 50251257263269281293307311317337
51 - 60347353359379389401409419431443
61 - 70449461467479487491499503509521
71 - 80541557563569571577587599617631
81 - 90641647653659677683701719743751
91 - 100761769787797809811821827829839
101 - 110857863877881887911919937941947
111 - 12095397197798399110091019103110391049
121 - 1301061109110971109111711511163118711931201
131 - 1401217122912591277128312891291129713011319
141 - 1501327136113671381139914091427143914511459
151 - 1601471148114871499151115531559156715831601
161 - 1701607161916211637166716691697170917211733
171 - 1801759177717871801184718711877188919011907
181 - 1901913193119491979199720032017202720292039
191 - 2002069208120872099211121292141215321792207
201 - 2102213223722432251226722692281230923332339
211 - 2202351235723812389239324112417244124472459
221 - 2302467247725312543254925572579259126092621
231 - 2402647265726592687269927112719272927312741
241 - 2502777278928012837284328572861287928972909
251 - 2602927293929572963296929712999301130373041
261 - 2703061308330893119313731673181318731913203
271 - 2803221325132573259327132993307332933473359
281 - 2903371338934073413345734613467349135113527
291 - 3003539354135573559358135933637365936713677
301 - 3103691370937193761376737793797380338213847
311 - 3203851386338813889390739173919392939473989
321 - 3304001400740194049409140994127413341394157
331 - 3404211421742294241425942714283428942974337
341 - 3504339434943574391439744094421444144474451
351 - 3604481451745474567459146374643464946574679
361 - 3704703472147334787478947994801481748614871
371 - 3804889490949314937496749694987499950095021
381 - 3905039505150775087509951475153516751715189
391 - 4005197523152615279529753035309534753515381
401 - 4105387539954175431544154715477548355015507
411 - 4205519553155815639565156575669570157115737
421 - 4305741579158015807581358495851586758795897
431 - 4405903593959815987600760116029604760796089
441 - 4506101611361316143619762476257626962876299
451 - 4606311631763296337635964216427644964816491
461 - 4706521655165696581660766196637665966616689
471 - 4806701670967376761677967916803682768336841
481 - 4906863686968996911694769596971697769977001
491 - 5007039704370697079710971217127712971517177
501 - 5107193721172297247725373077309732173317349
511 - 5207417743374517457748174877499750775177529
521 - 5307541754775597561758975917607764976697727
531 - 5407757779378177829785378777901790779197937
541 - 5507949800980118059806980818087809381178147
551 - 5608171819182198221823182918297832983698387
561 - 5708389842985018527853785438581859786098627
571 - 5808663868186898707874187478779880788198837
581 - 5908849886188878933895189698999900190119029
591 - 6009041906791099181919992099221922792399257
601 - 6109281931193419377941994319437946194679479
611 - 6209491952195339551958796299649966196779689
621 - 6309719974397679769979198119839985198579901
631 - 64099299941996710007100371003910061100671007910091
641 - 65010111101331013910169101811019310211102471025910271
651 - 66010289103011031310331103431036910391103991042710433
661 - 67010457104871049910529105311055910597106011060710639
671 - 68010667107091071110739107811079910837108471085910867
681 - 69010889108911090910937109491097911027110571106911071
691 - 70011087111171115911171111771119711213112611127911299
701 - 71011351113691139911411114471146711483114891149711519
711 - 72011549115511157911587115971162111657116811169911717
721 - 73011719117311177711783117891182711831118391189711903
731 - 74011909119271193911969119811198712007120111203712041
741 - 75012071121071211312149121611219712203122271223912251
751 - 76012269122771228112347123771237912401124371245712479
761 - 77012497125391256912601126111264112653126591271312721
771 - 78012743127571278112791128091282112889128931291112917
781 - 79012953129591297913001130071300913043130491310313109
791 - 80013121131271315113163131711321713229132591326713313
801 - 81013331133371333913367133971342113441134511345713463
811 - 82013469134771349913537135531356713577136191367913681
821 - 83013691137091372113751137571376313789137991380713829
831 - 84013841138591387713883139011390713931139671399714009
841 - 85014057140711408114087141071417714197142071424914251
851 - 86014303143211434714369143871440114437144471444914489
861 - 87014519145431454914561145911462114627146291463314657
871 - 88014669146991471714741147591478314797148131482714843
881 - 89014851148671486914879148911489714939149511495714969
891 - 90015017150311505315061150771510115107151311513715149
901 - 91015161152271524115259152691528715319153291535915401
911 - 92015413154391544315467154971551115527155511556915581
921 - 93015641156471567115679156831573115737157491576115767
931 - 94015791158091581715881158871588915907159591597116001
941 - 95016007160611606716097161031612716139161411618716229
951 - 96016249162531631916349163611641116421164271644716451
961 - 97016481164871649316519165291656116607166191663116649
971 - 98016661166911674116787168291687116901169211693716943
981 - 99016979170211702717033170471707717159171891720717209
991 - 100017231172911732117333173871740117417174191747117489
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