Write a program to implement an arbitrary-precision integer and to compute the 20th Mersenne prime.
Implement it such that it works with a vector or deque with each element representing a decimal digit.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.003784s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.109944s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.013040s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001338s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001125s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.009807s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.015676s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.008768s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.017055s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001082s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 229816 [ RunTime:0.015342s ]
