What two number when multiplied equals 643 (six hundred forty three)?
From the aboves multiple we can see that 643 is a multiple of 2 numbers.
The numbers are 1, 643
These numbers are called the factors of 643.
643= 643
A prime number is a number that is divisible only by 1 and itself (without a remainder).
643 is a prime number because it has only two factors 1 and itself.
Lets learn factorization of other numbers.