In a sealed bottle, if one bacterium is put in, the bottle will be full of bacteria after 1 minute. It is known that each bacterium splits into 2 per second, and 4 in 2 seconds... If two bacteria are put in at the beginning, it takes How many seconds does it take to fill the bottle with bacteria?
密封的瓶中，如果放进一个细菌，1分钟后瓶中就充满了细菌，已知每个细菌每秒分裂成2个，两秒分裂成4个…如果开始就放进两个细菌，要使瓶中充满细菌，最少需多少秒．
<gadget id="calculator">60 - 1</gadget>
<output>59</output>

<result>59</result>