Special odd numbers: Difference between revisions
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Task moved to [[Odd squarefree semiprimes]] one. |
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{{Draft task}} |
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[[Category:Prime Numbers]] |
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;Task: |
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Odd numbers of the form p*q where p and q are distinct primes, where '''p*q < 1000''' |
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<br><br> |
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=={{header|Ring}}== |
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<lang ring> |
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load "stdlib.ring" |
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see "working..." + nl |
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see "Special odd numbers are:" + nl |
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row = 0 |
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limit1 = 150 |
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Prim = [] |
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for n = 1 to limit1 |
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for m = n+1 to limit1-1 |
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if isprime(n) and isprime(m) |
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prod = n*m |
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if prod%2 = 1 |
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add(Prim,prod) |
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ok |
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ok |
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next |
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next |
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Prim = sort(Prim) |
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for n = 1 to len(Prim) |
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if Prim[n] > 1000 |
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n = n - 1 |
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exit |
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ok |
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see "" + Prim[n] + " " |
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if n%10 = 0 |
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see nl |
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ok |
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next |
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see nl + "Found " + n + " Special odd numbers." + nl |
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see "done..." + nl |
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</lang> |
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{{out}} |
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<pre> |
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working... |
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Special odd numbers are: |
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15 21 33 35 39 51 55 57 65 69 |
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77 85 87 91 93 95 111 115 119 123 |
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129 133 141 143 145 155 159 161 177 183 |
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185 187 201 203 205 209 213 215 217 219 |
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221 235 237 247 249 253 259 265 267 287 |
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291 295 299 301 303 305 309 319 321 323 |
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327 329 335 339 341 355 365 371 377 381 |
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391 393 395 403 407 411 413 415 417 427 |
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437 445 447 451 469 473 481 485 493 497 |
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505 511 515 517 527 533 535 545 551 553 |
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559 565 581 583 589 611 623 629 635 649 |
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655 667 671 679 685 689 695 697 703 707 |
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713 721 731 737 745 749 763 767 779 781 |
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791 793 799 803 817 851 869 871 889 893 |
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899 901 913 917 923 943 949 959 973 979 |
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989 |
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Found 151 Special odd numbers. |
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done... |
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</pre> |
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Latest revision as of 14:06, 3 April 2021
Task moved to Odd squarefree semiprimes one.