2 times 2 times 2 times 2 times 2 times 2 times 2 minus 1 equals 3 1 (person).

2. The minimum time required to notify 60 people is as follows:

Method 1: 2 times 2 times 2 times 2 times 2 times 2 minus 1 equals 3 1 (person), and 19 people need to be notified, so it takes one minute to notify this 19 person.

Method 2: 2 times 2 times 2 times 2 times 2 times 2 minus 1 equals 63 (people), and 50 people can be notified in 6 minutes, so it takes 6 minutes to notify 60 people.

Extended data:

Matters needing attention in doing application problems:

1, pay attention to the exam. Just read the questions three times before doing them, and find out the meaning, quantitative relationship, what the problem is and how many questions there are. Understand the arithmetic of addition, subtraction, multiplication and division and determine the method. Make sure you need several answers.

2. Pay attention to the format. General format for solving application problems in fifth grade of primary school: formula,? Unit? Answer. Usually, some children will lose points because they forget to write units and answers.

3. Pay attention to special problems. If there is a remainder, both the remainder and the quotient should be written in the solution; Related to practical problems in life, the problem of renting a car (if there is a surplus, the number should be added to1); Tree problem (number of trees at both ends plus1); There are additional conditions (don't use everything).