GCF for 2 and 1

What is the Greatest Common Factor of 2 and 1?

Answer: GCF of 2 and 1 is 1

(One)

Finding GCF for 2 and 1 using all factors (divisors) listing

The first method to find GCF for numbers 2 and 1 is to list all factors for both numbers and pick the highest common one:

All factors of 2: 1, 2

All factors of 1: 1

So the Greatest Common Factor for 2 and 1 is 1

Finding GCF for 2 and 1 by Prime Factorization

GCF Table

Number 1Number 2GCF
111
211
311
411
511
611
711
811
911
1011
1111
1211
1311
1411
1511
1611
1711
1811
1911
2011
2111
2211
2311
2411
2511
2611
2711
2811
2911
3011

About "Greatest Common Factor" Calculator

This calculator will help you find the greatest common factor (GCF) of two numbers. For example, it can help you find out what is the Greatest Common Factor of 2 and 1? (The answer is: 1). Select the first number (e.g. '2') and the second number (e.g. '1'). After that hit the 'Calculate' button.
Greatest Common Factor (GCF) also known as the Greatest Common Divisor (GCD) or Highest Common Factor (HCF) - it is the largest positive integer that divides each of the integers with zero remainder

FAQ

What is the Greatest Common Factor of 2 and 1?

GCF of 2 and 1 is 1