HuzI found a bug in pcoul version 20260115:
Код:
T:\Hugo\20260115>pcoul.exe -x156e9 12 7
001 pcoul(12 7) -x156000000000 *RT*
b60: 2 139^2 2^2.3 . 2 3^2 2^5: 3423 / 14016
367 coul(12, 7): recurse 3770426, walk 3769819, walkc 45436956 (39.23s) [23217210 1525482 280425 16685 1180 172 21]
T:\Hugo\20260115>pcoul.exe -x155e9:156e9 12 7
001 pcoul(12 7) -x155000000000:156000000000 *RT*
b43: 2^2.5 7^2 2.3^2 . 2^5 3.5^2 2: 220872 / 221088
202 Candidate 155385466971 (2.15s)
367 coul(12, 7): recurse 323768, walk 323654, walkc 2222556 (2.29s) [1147663 78100 11465 675 46 1 0]
200 f(12, 7) = 155385466971 (2.29s)
T:\Hugo\20260115>pcoul.exe -x154e9:156e9 12 7
001 pcoul(12 7) -x154000000000:156000000000 *RT*
b49: 839^2 2^2.3 . 2 3 2^5 .: 1142 / 1154
202 Candidate 155385466971 (3.04s)
367 coul(12, 7): recurse 409212, walk 409079, walkc 3686344 (3.32s) [1909642 113979 21989 1137 69 5 0]
200 f(12, 7) = 155385466971 (3.32s)
T:\Hugo\20260115>pcoul.exe -x153e9:156e9 12 7
001 pcoul(12 7) -x153000000000:156000000000 *RT*
b55: 2 11^2 2^2.3 13^2 2 3 2^5: 39378 / 39732
367 coul(12, 7): recurse 526811, walk 526651, walkc 4664198 (4.26s) [2433829 150203 27188 1301 80 5 2]
T:\Hugo\20260115>pcoul.exe -x152e9:156e9 12 7
001 pcoul(12 7) -x152000000000:156000000000 *RT*
b60: 2 13^2 2^2.3 . 2 3^2 2^5: 1592666 / 1602563
367 coul(12, 7): recurse 571515, walk 571345, walkc 5698244 (5.07s) [3009799 179377 33882 1651 104 7 3]
T:\Hugo\20260115>pcoul.exe -x151e9:156e9 12 7
001 pcoul(12 7) -x151000000000:156000000000 *RT*
b49: 59^2 2^2.3 . 2 3 2^5 .: 227013 / 233409
367 coul(12, 7): recurse 674871, walk 674679, walkc 6056571 (5.63s) [3183932 200979 34431 1779 111 9 3]
T:\Hugo\20260115>pcoul.exe -x150e9:156e9 12 7
001 pcoul(12 7) -x150000000000:156000000000 *RT*
b58: 2.5^2 2539^2 2^2.3 . 2 3^2.5 2^5
367 coul(12, 7): recurse 712455, walk 712255, walkc 6908588 (6.15s) [3616829 210895 40480 2108 132 11 3]
As you can see, as the interval increases downwards, it stops finding the chain.
At the same time, version 20251121 always finds the same conditions:
Код:
T:\Hugo\20251121>pcoul.exe -x156e9 12 7
001 pcoul(12 7) -x156000000000 *RT*
b49: 1427^2 2^2.3 . 2 3 2^5 .: 127 / 398
202 Candidate 155385466971 (49.37s)
b60: 2 23^2 2^2.3 54679^2 2 3^2 2^5
367 coul(12, 7): recurse 5100890, walk 5104598, walkc 61788149 (54.60s) [30752131 2114729 418850 20905 1437 254 32]
200 f(12, 7) = 155385466971 (54.60s)
T:\Hugo\20251121>pcoul.exe -x155e9:156e9 12 7
001 pcoul(12 7) -x155000000000:156000000000 *RT*
b32: 71^2 2 3 2^2 . 2.3^2 .: 429713 / 429808
202 Candidate 155385466971 (2.95s)
b52: 337^2 2^2.3 . 2 3^2 2^5 .: 2370 / 2374
367 coul(12, 7): recurse 350630, walk 350570, walkc 3317512 (3.14s) [1688096 111053 18212 1004 70 2 0]
200 f(12, 7) = 155385466971 (3.14s)
T:\Hugo\20251121>pcoul.exe -x154e9:156e9 12 7
001 pcoul(12 7) -x154000000000:156000000000 *RT*
b45: 2^2 11^2 2.3^2 . 2^5 3 2: 2220445 / 2238291
202 Candidate 155385466971 (4.24s)
367 coul(12, 7): recurse 530306, walk 530216, walkc 4778107 (4.63s) [2376929 161357 28285 1240 83 5 0]
200 f(12, 7) = 155385466971 (4.63s)
T:\Hugo\20251121>pcoul.exe -x153e9:156e9 12 7
001 pcoul(12 7) -x153000000000:156000000000 *RT*
b43: 2^2.5 1949^2 2.3^2 . 2^5 3.5^2 2
202 Candidate 155385466971 (5.33s)
367 coul(12, 7): recurse 637483, walk 637373, walkc 6063400 (5.79s) [3080824 206597 35253 1566 99 6 2]
200 f(12, 7) = 155385466971 (5.79s)
T:\Hugo\20251121>pcoul.exe -x152e9:156e9 12 7
001 pcoul(12 7) -x152000000000:156000000000 *RT*
b35: 3 2 311^2 2^2.3 . 2 3^2: 21996 / 22401
202 Candidate 155385466971 (6.83s)
b52: 173^2 2^2.3 . 2 3^2 2^5 .: 8948 / 9013
367 coul(12, 7): recurse 657515, walk 657402, walkc 7953843 (7.43s) [4081852 274781 46845 2030 130 10 4]
200 f(12, 7) = 155385466971 (7.43s)
T:\Hugo\20251121>pcoul.exe -x151e9:156e9 12 7
001 pcoul(12 7) -x151000000000:156000000000 *RT*
b46: 2^2.3 1237^2 2 3 2^5 . 2.3^2: 172 / 176
202 Candidate 155385466971 (7.24s)
202 Candidate 155385466971 (7.25s)
367 coul(12, 7): recurse 804438, walk 804303, walkc 8492226 (7.97s) [4329194 289150 50714 2214 148 15 3]
200 f(12, 7) = 155385466971 (7.97s)
T:\Hugo\20251121>pcoul.exe -x150e9:156e9 12 7
001 pcoul(12 7) -x150000000000:156000000000 *RT*
b45: 2^2 13^2 2.3^2 . 2^5 3 2: 1576504 / 1602563
202 Candidate 155385466971 (8.39s)
b57: 2 3 2^2 89^2 2.3^2 . 2^5: 33782 / 34056
367 coul(12, 7): recurse 848655, walk 848513, walkc 9752996 (9.16s) [4957926 343110 55927 2556 165 20 4]
200 f(12, 7) = 155385466971 (9.16s)
In both cases, the windows7 version was used.
-- 19.02.2026, 03:32 --интересовался содержимым квадратных скобок. Теперь кому-нибудь (кроме Хьюго) понятно, что в них считается?
Да.
Так вопрос решился или смысл чисел остался недопонятым (или и не нужным)?