n = 618240007109027021

Select a bound for the factorial.

bound = is an acceptable limit.

In this case about 43 .

The exponent will be 43! (factorial of 43)

Choose some number to raise to that exponential value. Any number (a) from 2 to n-1 is useable.

You may want to check that .

2 is ok.

If

then you have a factor of n

If not then raise the bound limit.

In this case one of the factors is a 9 digit number.

The first 3 digits and the last 3 digits are

250___201

.