Special odd numbers

Special odd numbers is a draft programming task. It is not yet considered ready to be promoted as a complete task, for reasons that should be found in its talk page.

Task

Odd numbers of the form p*q where p and q are distinct primes, where p*q < 1000

Julia

<lang julia>using Primes

twoprimeproduct(n) = (a = factor(n).pe; length(a) == 2 && all(p -> p[2] == 1, a))

special1k = filter(n -> isodd(n) && isspecialodd(n), 1:1000)

foreach(p -> print(rpad(p[2], 4), p[1] % 20 == 0 ? "\n" : ""), enumerate(special1k))

</lang>

Output:

15  21  33  35  39  51  55  57  65  69  77  85  87  91  93  95  111 115 119 123 
129 133 141 143 145 155 159 161 177 183 185 187 201 203 205 209 213 215 217 219
221 235 237 247 249 253 259 265 267 287 291 295 299 301 303 305 309 319 321 323
327 329 335 339 341 355 365 371 377 381 391 393 395 403 407 411 413 415 417 427
437 445 447 451 453 469 471 473 481 485 489 493 497 501 505 511 515 517 519 527
533 535 537 543 545 551 553 559 565 573 579 581 583 589 591 597 611 623 629 633
635 649 655 667 669 671 679 681 685 687 689 695 697 699 703 707 713 717 721 723
731 737 745 749 753 755 763 767 771 779 781 785 789 791 793 799 803 807 813 815
817 831 835 843 849 851 865 869 871 879 889 893 895 899 901 905 913 917 921 923
933 939 943 949 951 955 959 965 973 979 985 989 993 995

Ring

<lang ring> load "stdlib.ring"

see "working..." + nl see "Special odd numbers are:" + nl

row = 0 limit1 = 150 Prim = []

for n = 1 to limit1

   for m = n+1 to limit1-1
       if isprime(n) and isprime(m)
          prod = n*m
          if prod%2 = 1
             add(Prim,prod)
          ok
       ok
   next

next

Prim = sort(Prim) for n = 1 to len(Prim)

   if Prim[n] > 1000
      n = n - 1
      exit
   ok
   see "" + Prim[n] + " "
   if n%10 = 0
      see nl
   ok

next

see nl + "Found " + n + " Special odd numbers." + nl see "done..." + nl </lang>

Output:

working...
Special odd numbers are:
15 21 33 35 39 51 55 57 65 69 
77 85 87 91 93 95 111 115 119 123 
129 133 141 143 145 155 159 161 177 183 
185 187 201 203 205 209 213 215 217 219 
221 235 237 247 249 253 259 265 267 287 
291 295 299 301 303 305 309 319 321 323 
327 329 335 339 341 355 365 371 377 381 
391 393 395 403 407 411 413 415 417 427 
437 445 447 451 469 473 481 485 493 497 
505 511 515 517 527 533 535 545 551 553 
559 565 581 583 589 611 623 629 635 649 
655 667 671 679 685 689 695 697 703 707 
713 721 731 737 745 749 763 767 779 781 
791 793 799 803 817 851 869 871 889 893 
899 901 913 917 923 943 949 959 973 979 
989 
Found 151 Special odd numbers.
done...