Triplets of practical numbers


A triplet of practical numbers is a triplet (m-2, m, m+2) of numbers all practicals. It is known that there are infinitely many such triplets. This list shows practical numbers m such that m-2 and m+2 are also practical.

Table no. 1

1 4
2 6
3 18
4 30
5 198
6 306
7 462
8 702
9 1482
10 2550
11 3330
12 4422
13 5778
14 6102
15 6498
16 9042
17 11178
18 11778
19 14418
20 15498

Table no. 2

21 17298
22 17442
23 19458
24 20862
25 21582
26 22878
27 23322
28 23550
29 25230
30 26622
31 26862
32 26910
33 27378
34 30210
35 34542
36 36738
37 38610
38 39006
39 39102
40 40350

Table no. 3

41 40662
42 41538
43 42978
44 46002
45 47058
46 49662
47 52578
48 53118
49 53730
50 53790
51 55746
52 57150
53 57618
54 60258
55 60786
56 61182
57 61542
58 61938
59 62130
60 62622

Table no. 4

61 65538
62 67230
63 67938
64 69498
65 74898
66 76302
67 77250
68 78498
69 79422
70 79902
71 88506
72 88578
73 92202
74 93438
75 94302
76 96222
77 97902
78 102858
79 105378
80 106782

Table no. 5

81 107778
82 108834
83 112098
84 113202
85 113982
86 115182
87 117126
88 117234
89 118818
90 119538
91 120498
92 120990
93 122670
94 123006
95 124098
96 124542
97 128214
98 129582
99 131070
100 131238

Table no. 6

101 132354
102 132462
103 132498
104 137538
105 141858
106 143262
107 144450
108 145794
109 145962
110 149058
111 151230
112 151902
113 152658
114 153918
115 154926
116 160818
117 166518
118 168642
119 168870
120 174690

Table no. 7

121 182250
122 184830
123 185022
124 185742
125 188802
126 189198
127 189378
128 190302
129 191982
130 192738
131 193662
132 196098
133 197982
134 200382
135 203058
136 208290
137 208962
138 211482
139 214542
140 215514

Table no. 8

141 219102
142 221562
143 222222
144 225342
145 226182
146 230142
147 231198
148 232578
149 234498
150 236898
151 237690
152 239598
153 239778
154 243906
155 244902
156 245250
157 245502
158 247158
159 249858
160 251262

Table no. 9

161 264402
162 266814
163 268770
164 271458
165 275154
166 277506
167 281502
168 282438
169 285570
170 285822
171 295038
172 296322
173 297702
174 301182
175 307746
176 308178
177 308502
178 311298
179 311418
180 311982

Table no. 10

181 312702
182 315018
183 317502
184 318978
185 319902
186 323202
187 326118
188 326742
189 328302
190 329382
191 334098
192 335358
193 336258
194 341502
195 341850
196 344862
197 345462
198 348462
199 357858
200 359490

Table no. 11

201 359658
202 363690
203 366498
204 367722
205 367950
206 369798
207 371778
208 372222
209 372498
210 375498
211 377538
212 385530
213 388278
214 389298
215 392502
216 393822
217 397698
218 398466
219 403002
220 406782

Table no. 12

221 408702
222 409698
223 409950
224 414594
225 416670
226 421650
227 424578
228 426690
229 430782
230 431298
231 431730
232 432822
233 433134
234 433782
235 436158
236 440802
237 444222
238 448590
239 450738
240 458898

Table no. 13

241 460290
242 463218
243 466578
244 467742
245 474498
246 476502
247 481518
248 485298
249 489942
250 491202
251 491502
252 492882
253 493950
254 495234
255 497250
256 498762
257 499662
258 503622
259 504030
260 508662

Table no. 14

261 511938
262 512622
263 514098
264 517242
265 520830
266 522102
267 524898
268 526878
269 529230
270 530178
271 530658
272 531522
273 531918
274 533370
275 535302
276 535458
277 540498
278 540594
279 549822
280 552978

Table no. 15

281 560898
282 561090
283 561150
284 564450
285 568098
286 569502
287 575298
288 582822
289 583422
290 584166
291 585342
292 591330
293 600066
294 600402
295 604998
296 605022
297 605982
298 607290
299 608190
300 618462

Table no. 16

301 619554
302 620862
303 623502
304 623898
305 628938
306 630498
307 634338
308 637362
309 641058
310 648702
311 653718
312 656238
313 659934
314 663102
315 664578
316 668670
317 669942
318 670626
319 673218
320 674658

Table no. 17

321 676062
322 677502
323 680262
324 682722
325 689502
326 697818
327 699246
328 703890
329 707586
330 708318
331 710334
332 711282
333 714474
334 716898
335 727902
336 732450
337 734526
338 735642
339 747738
340 753102

Table no. 18

341 756702
342 759330
343 767142
344 776130
345 785538
346 786942
347 804078
348 804102
349 804750
350 808302
351 809562
352 816222
353 817518
354 819018
355 822558
356 839358
357 841698
358 842994
359 845502
360 848538

Table no. 19

361 850542
362 858702
363 860622
364 863298
365 872898
366 873630
367 874302
368 879282
369 882198
370 883710
371 895698
372 902970
373 903810
374 907902
375 910530
376 910938
377 912270
378 919338
379 919998
380 930690

Table no. 20

381 932202
382 933042
383 943542
384 944526
385 947718
386 948738
387 960258
388 964062
389 967302
390 968418
391 970002
392 979902
393 980478
394 981090
395 988038
396 989298
397 992682
398 995598

(Giuseppe Melfi - melfi@dm.unipi.it)

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