Four conjectures in mathematics include Goldbach conjecture, four-color conjecture, Fermat conjecture and Haier conjecture.

Goldbach conjecture refers to the conjecture that any even number greater than 2 can be expressed as the sum of two prime numbers.

Four-color conjecture refers to the conjecture that any map can distinguish different regions with only four colors.

Fermat conjecture refers to any positive integer n 2, and the equation x n+y n = z n has no positive integer solution.

In this way, we can finally get the result with the value of 1.

These conjectures are famous unsolved problems in the field of mathematics, which still attract the attention and research of many mathematicians.