Happy primes up to 26722

Happy primes: Primes that eventually reach 1 under iteration of: x -> sum of squares of digits of x.

There is 471 happy primes smaller than 26722.

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

List#

7, 13, 19, 23, 31, 79, 97, 103, 109, 139, 167, 193, 239, 263, 293, 313, 331, 367, 379, 383, 397, 409, 487, 563, 617, 653, 673, 683, 709, 739, 761, 863, 881, 907, 937, 1009, 1033, 1039, 1093, 1151, 1277, 1303, 1373, 1427, 1447, 1481, 1487, 1511, 1607, 1663, 1697, 1733, 1847, 1933, 2003, 2039, 2063, 2111, 2221, 2309, 2333, 2339, 2383, 2393, 2417, 2557, 2693, 2741, 2833, 2851, 2903, 2963, 3001, 3019, 3067, 3079, 3083, 3109, 3137, 3209, 3301, 3313, 3319, 3323, 3329, 3331, 3371, 3391, 3463, 3607, 3637, 3643, 3673, 3709, 3779, 3797, 3803, 3823, 3833, 3907, 3923, 3931, 4111, 4127, 4157, 4217, 4271, 4363, 4441, 4447, 4481, 4517, 4663, 4721, 4751, 4817, 4871, 5147, 5227, 5281, 5417, 5471, 5477, 5527, 5569, 5659, 5741, 5821, 5879, 5897, 5987, 6037, 6053, 6073, 6163, 6197, 6203, 6329, 6337, 6343, 6353, 6361, 6367, 6373, 6389, 6637, 6661, 6673, 6701, 6703, 6719, 6733, 6763, 6791, 6803, 6899, 6917, 6971, 6983, 7039, 7127, 7309, 7331, 7451, 7457, 7481, 7541, 7547, 7589, 7603, 7691, 7793, 7841, 7937, 8081, 8147, 8233, 8369, 8521, 8597, 8693, 8699, 8741, 8821, 8929, 8963, 8969, 9001, 9007, 9013, 9103, 9133, 9203, 9323, 9377, 9587, 9623, 9689, 9829, 9857, 10009, 10039, 10067, 10093, 10141, 10151, 10177, 10211, 10247, 10303, 10333, 10337, 10427, 10457, 10487, 10607, 10663, 10733, 10771, 10847, 10903, 11113, 11131, 11149, 11159, 11197, 11243, 11251, 11311, 11423, 11467, 11471, 11483, 11491, 11519, 11681, 11719, 11941, 11971, 12011, 12101, 12143, 12149, 12347, 12413, 12437, 12473, 12491, 12511, 12583, 12671, 12743, 12823, 12841, 12853, 12941, 12959, 13003, 13009, 13033, 13037, 13093, 13177, 13241, 13309, 13339, 13411, 13421, 13457, 13487, 13499, 13577, 13679, 13697, 13757, 13841, 13903, 13933, 13967, 14011, 14057, 14081, 14087, 14207, 14281, 14321, 14327, 14347, 14387, 14407, 14437, 14449, 14461, 14537, 14549, 14551, 14561, 14723, 14753, 14783, 14813, 14821, 14831, 14939, 15101, 15121, 15299, 15377, 15451, 15461, 15473, 15541, 15641, 15679, 15737, 15773, 15787, 15823, 15877, 15887, 16007, 16063, 16097, 16127, 16217, 16363, 16417, 16451, 16603, 16633, 16741, 16759, 16811, 16937, 16993, 17027, 17033, 17107, 17137, 17191, 17207, 17317, 17443, 17483, 17569, 17573, 17609, 17627, 17659, 17669, 17713, 17827, 17911, 18041, 18047, 18143, 18223, 18253, 18341, 18401, 18413, 18523, 18587, 18743, 18757, 18839, 18899, 19141, 19259, 19333, 19421, 19699, 19763, 19889, 19963, 19979, 19997, 20063, 20147, 20177, 20333, 20369, 20393, 20639, 20693, 20717, 20771, 20899, 20903, 20963, 21011, 21101, 21143, 21149, 21283, 21341, 21347, 21407, 21419, 21481, 21491, 21599, 21617, 21767, 21787, 21841, 22129, 22229, 22273, 22291, 22381, 22483, 22549, 22573, 22621, 22651, 22783, 22861, 22921, 23039, 23227, 23369, 23417, 23447, 23581, 23609, 23663, 23741, 23827, 23887, 23893, 23899, 23977, 24071, 24107, 24113, 24137, 24181, 24229, 24317, 24371, 24473, 24683, 24859, 25057, 25111, 25183, 25237, 25261, 25453, 25561, 25621, 25657, 25801, 25849, 25919, 26003, 26171, 26177, 26227, 26251, 26267, 26309, 26339, 26393, 26557, 26627, 26633, 26669, 26711, 26717

Table#

 12345678910
1 - 107131923317997103109139
11 - 20167193239263293313331367379383
21 - 30397409487563617653673683709739
31 - 4076186388190793710091033103910931151
41 - 501277130313731427144714811487151116071663
51 - 601697173318471933200320392063211122212309
61 - 702333233923832393241725572693274128332851
71 - 802903296330013019306730793083310931373209
81 - 903301331333193323332933313371339134633607
91 - 1003637364336733709377937973803382338333907
101 - 1103923393141114127415742174271436344414447
111 - 1204481451746634721475148174871514752275281
121 - 1305417547154775527556956595741582158795897
131 - 1405987603760536073616361976203632963376343
141 - 1506353636163676373638966376661667367016703
151 - 1606719673367636791680368996917697169837039
161 - 1707127730973317451745774817541754775897603
171 - 1807691779378417937808181478233836985218597
181 - 1908693869987418821892989638969900190079013
191 - 2009103913392039323937795879623968998299857
201 - 21010009100391006710093101411015110177102111024710303
211 - 22010333103371042710457104871060710663107331077110847
221 - 23010903111131113111149111591119711243112511131111423
231 - 24011467114711148311491115191168111719119411197112011
241 - 25012101121431214912347124131243712473124911251112583
251 - 26012671127431282312841128531294112959130031300913033
261 - 27013037130931317713241133091333913411134211345713487
271 - 28013499135771367913697137571384113903139331396714011
281 - 29014057140811408714207142811432114327143471438714407
291 - 30014437144491446114537145491455114561147231475314783
301 - 31014813148211483114939151011512115299153771545115461
311 - 32015473155411564115679157371577315787158231587715887
321 - 33016007160631609716127162171636316417164511660316633
331 - 34016741167591681116937169931702717033171071713717191
341 - 35017207173171744317483175691757317609176271765917669
351 - 36017713178271791118041180471814318223182531834118401
361 - 37018413185231858718743187571883918899191411925919333
371 - 38019421196991976319889199631997919997200632014720177
381 - 39020333203692039320639206932071720771208992090320963
391 - 40021011211012114321149212832134121347214072141921481
401 - 41021491215992161721767217872184122129222292227322291
411 - 42022381224832254922573226212265122783228612292123039
421 - 43023227233692341723447235812360923663237412382723887
431 - 44023893238992397724071241072411324137241812422924317
441 - 45024371244732468324859250572511125183252372526125453
451 - 46025561256212565725801258492591926003261712617726227
461 - 47026251262672630926339263932655726627266332666926711
471 - 48026717         
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