■セクシー素数 http://ja.wikipedia.org/wiki/%E3%82%BB%E3%82%AF%E3%82%B7%E3%83%BC%E7%B4%A0%E6%95%B0 ■差が 6 の素数の組 (p,p+6) $ for n in `seq 1 500`;do \ echo $((0x`openssl prime "$n" | awk '($3!="not"){print $1}'`)) ; \ done | grep -v "^0\$" | \ for m in `xargs`;do \ echo "$m" | awk '{print ($1+6)}' | xargs factor | \ awk '(NF==2){printf "%4d,%4d\n",$2-6,$2}'; \ done | nl -w 2 -n rn | sed s/'\t'/" "/g 1 5, 11 2 7, 13 3 11, 17 4 13, 19 5 17, 23 6 23, 29 7 31, 37 8 37, 43 9 41, 47 10 47, 53 11 53, 59 12 61, 67 13 67, 73 14 73, 79 15 83, 89 16 97, 103 17 101, 107 18 103, 109 19 107, 113 20 131, 137 21 151, 157 22 157, 163 23 167, 173 24 173, 179 25 191, 197 26 193, 199 27 223, 229 28 227, 233 29 233, 239 30 251, 257 31 257, 263 32 263, 269 33 271, 277 34 277, 283 35 307, 313 36 311, 317 37 331, 337 38 347, 353 39 353, 359 40 367, 373 41 373, 379 42 383, 389 43 433, 439 44 443, 449 45 457, 463 46 461, 467
