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  1. or download this
    #!/usr/bin/env perl
use strict;
...
printf "Collatz(%5d) has sequence length of %3d steps\n", @$_
    for @seqs;
  2. or download this
    #!/usr/bin/env perl
use strict;
...
printf "Collatz(%5d) has sequence length of %3d steps\n", @$_
    for @seqs;
  3. or download this
    #!/usr/bin/env perl
use strict;
...
printf "Collatz(%5d) has sequence length of %3d steps\n", @$_
    for @seqs;
  4. or download this
    64-bit VM:
                   rjt   0.903s
...
Collatz(922524) has sequence length of 445 steps
Collatz(922525) has sequence length of 445 steps