Hi, I ran your primes program up to 1000, and compared output
to another prime generator. 
#!/usr/bin/perl
print"@{[grep{(1x$_)!~/^(11+?)\1+$/}2..shift||1e3]}\n";

[download]
Now I can't say that the above script generates correct numbers;
but there is something funny. I think your script dosn't generate
all possible primes.
The output from your script, up to 1000, follows:
2 3 5 7 11 13 17 19 31 37 53 59 71 97
139 151 173 277 349 383 431 577 773 839

The output from the 1-liner above is:
2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67
71 73 79 83 89 97 101 103 107 109 113 127 131 137
139 149 151 157 163 167 173 179 181 191 193 197
199 211 223 227 229 233 239 241 251 257 263 269
271 277 281 283 293 307 311 313 317 331 337 347
349 353 359 367 373 379 383 389 397 401 409 419
421 431 433 439 443 449 457 461 463 467 479 487
491 499 503 509 521 523 541 547 557 563 569 571
577 587 593 599 601 607 613 617 619 631 641 643
647 653 659 661 673 677 683 691 701 709 719 727
733 739 743 751 757 761 769 773 787 797 809 811
821 823 827 829 839 853 857 859 863 877 881 883
887 907 911 919 929 937 941 947 953 967 971 977
983 991 997

Just the fact that your script misses 23 and 29, seems bad to
me, I didn't bother to check higher. 23 and 29 are primes,
right?

In reply to Re: Finding Primes by zentara
in thread Finding Primes by Fideist11

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.