The document contains a table listing pairs of numbers and whether they are relatively prime or not. For each pair of numbers (ranging from 2 to 19) and a third number (ranging from 20 to 28), it is marked with a / × to indicate whether the three numbers are pairwise relatively prime or not.

1. PAIR OF
NUMBERS
RELATIVELY
PRIME
PAIRWISE
RELATIVELY
PRIME
2, 3, 20 / ×
2, 3, 21 / ×
2, 3, 22 / ×
2, 3, 23 / /
2, 3, 24 / ×
2, 3, 25 / /
2,3, 26 / ×
2, 3, 27 / ×
2, 3, 28 / ×
2, 5, 20 / ×
2, 5, 21 / /
2, 5, 22 / ×
2, 5, 23 / /
2, 5, 24 / ×
2, 5, 25 / ×
2, 5, 26 / ×
2, 5, 27 / /
2, 5, 28 / ×
2, 7, 20 / ×
2, 7, 21 / ×
2, 7, 22 / ×
2, 7, 23 / /
2, 7, 24 / ×
2, 7, 25 / /
2, 7, 26 / ×
2, 7, 27 / /
2, 7, 28 / ×
2,9, 20 / ×
2, 9, 21 / ×
2, 9, 22 / ×
PAIR OF
NUMBERS
RELATIVELY
PRIME
PAIRWISE
RELATIVELY
PRIME
2, 9, 23 / /
2, 9, 24 / ×
2, 9, 25 / /
2, 9, 26 / ×
2, 9, 27 / ×
2, 9, 28 / ×
2, 11, 20 / ×
2, 11, 21 / /
2, 11, 22 / ×
2, 11, 23 / /
2, 11, 24 / ×
2,11, 25 / /
2, 11, 26 / ×
2, 11, 27 / /
2, 11, 28 / ×
2, 13, 20 / ×
2, 13, 21 / /
2, 13, 22 / ×
2, 13, 23 / /
2, 13, 24 / ×
2, 13, 25 / /
2, 13, 26 / ×
2, 13, 27 / /
2, 13, 28 / ×
2, 15, 20 / ×
2, 15, 21 / ×
2, 15, 22 / ×
2, 15, 23 / /
2, 15, 24 / ×
2, 15, 25 / ×
PAIR OF
NUMBERS
RELATIVELY
PRIME
PAIRWISE
RELATIVELY
PRIME
2, 15, 26 / ×
2, 15, 27 / ×
2, 15, 28 / ×
2, 17, 20 / ×
2, 17, 21 / /
2, 17, 22 / ×
2, 17, 23 / /
2, 17, 24 / ×
2, 17, 25 / /
2, 17, 26 / ×
2, 17, 27 / /
2, 17, 28 / ×
2, 19, 20 / ×
2, 19, 21 / /
2, 19, 22 / ×
2, 19, 23 / /
2,19, 24 / ×
2, 19, 25 / ×
2, 19, 26 / ×
2,19, 27 / /
2, 19, 28 / ×
4, 3, 20 / ×
4, 3, 21 / ×
4, 3, 22 / ×
4, 3, 23 / /
4, 3, 24 / ×
4, 3, 25 / /
4, 3, 26 / ×
4, 3, 27 / ×
4, 3, 28 / ×

2. PAIR OF
NUMBERS
RELATIVELY
PRIME
PAIRWISE
RELATIVELY
PRIME
4, 5, 20 / ×
4, 5, 21 / /
4, 5, 22 / ×
4, 5, 23 / /
4, 5, 24 / ×
4, 5, 25 / ×
4, 5, 26 / ×
4, 5, 27 / /
4, 5, 28 / ×
4, 7, 20 / ×
4, 7, 21 / ×
4, 7, 22 / ×
4, 7, 23 / /
4, 7, 24 / ×
4, 7, 25 / /
4, 7, 26 / ×
4, 7, 27 / /
4, 7, 28 / ×
4,9, 20 / ×
4, 9, 21 / ×
4, 9, 22 / ×
4, 9, 23 / /
4, 9, 24 / ×
4, 9, 25 / /
4, 9, 26 / ×
4, 9, 27 / ×
4, 9, 28 / ×
4, 11, 20 / ×
4, 11, 21 / /
4, 11, 22 / ×
PAIR OF
NUMBERS
RELATIVELY
PRIME
PAIRWISE
RELATIVELY
PRIME
4, 11, 23 / /
4, 11, 24 / ×
4, 11, 25 / /
4, 11, 26 / ×
4, 11, 27 / /
4, 11, 28 / ×
4, 13, 20 / ×
4, 13, 21 / /
4, 13, 22 / ×
4, 13, 23 / /
4, 13, 24 / ×
4, 13, 25 / /
4, 13, 26 / ×
4, 13, 27 / /
4, 13, 28 / ×
4, 15, 20 / ×
4, 15, 21 / ×
4, 15, 22 / ×
4, 15, 23 / /
4, 15, 24 / ×
4, 15, 25 / ×
4, 15, 26 / ×
4, 15, 27 / ×
4, 15, 28 / ×
4, 17, 20 / ×
4, 17, 21 / /
4, 17, 22 / ×
4, 17, 23 / /
4, 17, 24 / ×
4, 17, 25 / /
PAIR OF
NUMBERS
RELATIVELY
PRIME
PAIRWISE
RELATIVELY
PRIME
4, 17, 26 / ×
4, 17, 27 / /
4, 17, 28 / ×
4, 19, 20 / ×
4, 19, 21 / /
4, 19, 22 / ×
4, 19, 23 / /
4,19, 24 / ×
4, 19, 25 / /
4, 19, 26 / ×
4,19, 27 / ×
4, 19, 28 / ×
6, 3, 20 / ×
6, 3, 21 / ×
6, 3, 22 / ×
6, 3, 23 / ×
6, 3, 24 / ×
6, 3, 25 / ×
6 ,3, 26 / ×
6, 3, 27 / ×
6, 3, 28 / ×
6, 5, 20 / ×
6, 5, 21 / ×
6, 5, 22 / ×
6, 5, 23 / /
6, 5, 24 / ×
6, 5, 25 / ×
6, 5, 26 / ×
6, 5, 27 / ×
6, 5, 28 / ×

3. PAIR OF
NUMBERS
RELATIVELY
PRIME
PAIRWISE
RELATIVELY
PRIME
6, 7, 20 / ×
6, 7, 21 / ×
6, 7, 22 / ×
6, 7, 23 / /
6, 7, 24 / ×
6, 7, 25 / /
6, 7, 26 / ×
6, 7, 27 / ×
6, 7, 28 / ×
6,9, 20 / ×
6, 9, 21 / ×
6, 9, 22 / ×
6, 9, 23 / ×
6, 9, 24 / ×
6, 9, 25 / ×
6, 9, 26 / ×
6, 9, 27 / ×
6, 9, 28 / ×
6, 11, 20 / ×
6, 11, 21 / ×
6, 11, 22 / ×
6, 11, 23 / /
6, 11, 24 / ×
6,11, 25 / /
6, 11, 26 / ×
6, 11, 27 / ×
6, 11, 28 / ×
6, 13, 20 / ×
6, 13, 21 / ×
6, 13, 22 / ×
PAIR OF
NUMBERS
RELATIVELY
PRIME
PAIRWISE
RELATIVELY
PRIME
6, 13, 23 / /
6, 13, 24 / ×
6, 13, 25 / /
6, 13, 26 / ×
6, 13, 27 / ×
6, 13, 28 / ×
6, 15, 20 / ×
6, 15, 21 / ×
6, 15, 22 / ×
6, 15, 23 / ×
6, 15, 24 / ×
6, 15, 25 / ×
6, 15, 26 / ×
6, 15, 27 / ×
6, 15, 28 / ×
6, 17, 20 / ×
6, 17, 21 / ×
6, 17, 22 / ×
6, 17, 23 / /
6, 17, 24 / ×
6, 17, 25 / /
6, 17, 26 / ×
6, 17, 27 / ×
6, 17, 28 / ×
6, 19, 20 / ×
6, 19, 21 / ×
6, 19, 22 / ×
6, 19, 23 / /
6,19, 24 / ×
6, 19, 25 / /
PAIR OF
NUMBERS
RELATIVELY
PRIME
PAIRWISE
RELATIVELY
PRIME
6, 19, 26 / ×
6,19, 27 / ×
6, 19, 28 / ×
8, 3, 20 / ×
8, 3, 21 / ×
8, 3, 22 / ×
8, 3, 23 / /
8, 3, 24 / ×
8, 3, 25 / /
8, 3, 26 / ×
8, 3, 27 / ×
8, 3, 28 / ×
8, 5, 20 / ×
8, 5, 21 / /
8, 5, 22 / ×
8, 5, 23 / /
8, 5, 24 / ×
8, 5, 25 / ×
8, 5, 26 / ×
8, 5, 27 / /
8, 5, 28 / ×
8, 7, 20 / ×
8, 7, 21 / ×
8, 7, 22 / ×
8, 7, 23 / /
8, 7, 24 / ×
8, 7, 25 / /
8, 7, 26 / ×
8, 7, 27 / /
8, 7, 28 / ×

4. PAIR OF
NUMBERS
RELATIVELY
PRIME
PAIRWISE
RELATIVELY
PRIME
8,9, 20 / ×
8, 9, 21 / ×
8, 9, 22 / ×
8, 9, 23 / /
8, 9, 24 / ×
8, 9, 25 / /
8, 9, 26 / ×
8, 9, 27 / ×
8, 9, 28 / ×
8, 11, 20 / ×
8, 11, 21 / /
8, 11, 22 / ×
8, 11, 23 / /
8, 11, 24 / ×
8, 11, 25 / /
8, 11, 26 / ×
8, 11, 27 / /
8, 11, 28 / ×
8, 13, 20 / ×
8, 13, 21 / /
8, 13, 22 / ×
8, 13, 23 / /
8, 13, 24 / ×
8, 13, 25 / /
8, 13, 26 / ×
8, 13, 27 / /
8, 13, 28 / ×
8, 15, 20 / ×
8, 15, 21 / ×
8, 15, 22 / ×
PAIR OF
NUMBERS
RELATIVELY
PRIME
PAIRWISE
RELATIVELY
PRIME
8, 15, 23 / /
8, 15, 24 / ×
8, 15, 25 / ×
8, 15, 26 / ×
8, 15, 27 / ×
8, 15, 28 / ×
8, 17, 20 / ×
8, 17, 21 / /
8, 17, 22 / ×
8, 17, 23 / /
8, 17, 24 / ×
8, 17, 25 / /
8, 17, 26 / ×
8, 17, 27 / /
8, 17, 28 / ×
8, 19, 20 / ×
8, 19, 21 / /
8, 19, 22 / ×
8, 19, 23 / /
8,19, 24 / ×
8, 19, 25 / /
8, 19, 26 / ×
8,19, 27 / /
8, 19, 28 / ×
10, 3, 20 / ×
10, 3, 21 / ×
10, 3, 22 / ×
10, 3, 23 / /
10, 3, 24 / ×
10, 3, 25 / ×
PAIR OF
NUMBERS
RELATIVELY
PRIME
PAIRWISE
RELATIVELY
PRIME
10,3, 26 / ×
10, 3, 27 / ×
10, 3, 28 / ×
10, 5, 20 / ×
10, 5, 21 / ×
10, 5, 22 / ×
10, 5, 23 / ×
10, 5, 24 / ×
10, 5, 25 / ×
10, 5, 26 / ×
10, 5, 27 / ×
10, 5, 28 / ×
10, 7, 20 / ×
10, 7, 21 / ×
10, 7, 22 / ×
10, 7, 23 / /
10, 7, 24 / ×
10, 7, 25 / ×
10, 7, 26 / ×
10, 7, 27 / ×
10, 7, 28 / ×
10, 9, 20 / ×
10, 9, 21 / ×
10, 9, 22 / ×
10, 9, 23 / /
10, 9, 24 / ×
10, 9, 25 / ×
10, 9, 26 / ×
10, 9, 27 / ×
10, 9, 28 / ×

5. PAIR OF
NUMBERS
RELATIVELY
PRIME
PAIRWISE
RELATIVELY
PRIME
10, 11, 20 / ×
10, 11, 21 / /
10, 11, 22 / ×
10, 11, 23 / /
10, 11, 24 / ×
10, 11, 25 / ×
10, 11, 26 / ×
10, 11, 27 / /
10, 11, 28 / ×
10, 13, 20 / ×
10, 13, 21 / /
10, 13, 22 / ×
10, 13, 23 / /
10, 13, 24 / ×
10, 13, 25 / ×
10, 13, 26 / ×
10, 13, 27 / /
10, 13, 28 / ×
10 15, 20 / ×
10, 15, 21 / ×
10, 15, 22 / ×
10, 15, 23 / ×
10, 15, 24 / ×
10, 15, 25 / ×
10, 15, 26 / ×
10, 15, 27 / ×
10, 15, 28 / ×
10, 17, 20 / ×
10, 17, 21 / /
10, 17, 22 / ×
PAIR OF
NUMBERS
RELATIVELY
PRIME
PAIRWISE
RELATIVELY
PRIME
10, 17, 23 / /
10, 17, 24 / ×
10, 17, 25 / ×
10, 17, 26 / ×
10, 17, 27 / /
10, 17, 28 / ×
10, 19, 20 / ×
10, 19, 21 / /
10, 19, 22 / ×
10, 19, 23 / /
10, 19, 24 / ×
10, 19, 25 / ×
10, 19, 26 / ×
10,19, 27 / /
10, 19, 28 / ×
12, 3, 20 / ×
12, 3, 21 /
12, 3, 22 / ×
12, 3, 23 / ×
12, 3, 24 / ×
12, 3, 25 / /
12,3, 26 / ×
12, 3, 27 / ×
12, 3, 28 / ×
12, 5, 20 / ×
12, 5, 21 / ×
12, 5, 22 / ×
12, 5, 23 / /
12, 5, 24 / ×
12, 5, 25 / ×
PAIR OF
NUMBERS
RELATIVELY
PRIME
PAIRWISE
RELATIVELY
PRIME
12, 5, 26 / ×
12, 5, 27 / ×
12, 5, 28 / ×
12, 7, 20 / ×
12, 7, 21 / ×
12, 7, 22 / ×
12, 7, 23 / /
12, 7, 24 / ×
12, 7, 25 / /
12, 7, 26 / ×
12, 7, 27 / ×
12, 7, 28 / ×
12, 9, 20 / ×
12, 9, 21 / ×
12, 9, 22 / ×
12, 9, 23 / ×
12, 9, 24 / ×
12, 9, 25 / ×
12, 9, 26 / ×
12, 9, 27 / ×
12, 9, 28 / ×
12, 11, 20 / ×
12, 11, 21 / ×
12, 11, 22 / ×
12, 11, 23 / /
12, 11, 24 / ×
12, 11, 25 / /
12, 11, 26 / ×
12, 11, 27 / ×
12, 11, 28 / ×

6. PAIR OF
NUMBERS
RELATIVELY
PRIME
PAIRWISE
RELATIVELY
PRIME
12, 13, 20 / ×
12, 13, 21 / ×
12, 13, 22 / ×
12, 13, 23 / /
12, 13, 24 / ×
12, 13, 25 / /
12, 13, 26 / ×
12, 13, 27 / ×
12, 13, 28 / ×
12 15, 20 / ×
12, 15, 21 / ×
12, 15, 22 / ×
12, 15, 23 / ×
12, 15, 24 / ×
12, 15, 25 / ×
12, 15, 26 / ×
12, 15, 27 / ×
12, 15, 28 / ×
12, 17, 20 / ×
12, 17, 21 / ×
12, 17, 22 / ×
12, 17, 23 / /
12, 17, 24 / ×
12, 17, 25 / /
12, 17, 26 / ×
12, 17, 27 / ×
12, 17, 28 / ×
12, 19, 20 / ×
12, 19, 21 / ×
12, 19, 22 / ×
PAIR OF
NUMBERS
RELATIVELY
PRIME
PAIRWISE
RELATIVELY
PRIME
12, 19, 23 / /
12, 19, 24 / ×
12, 19, 25 / /
12, 19, 26 / ×
12,19, 27 / ×
12, 19, 28 / ×
14, 3, 20 / ×
14, 3, 21 / ×
14, 3, 22 / ×
14, 3, 23 / /
14, 3, 24 / ×
14, 3, 25 / /
14, 3, 26 / ×
14, 3, 27 / ×
14, 3, 28 / ×
14, 5, 20 / ×
14, 5, 21 / ×
14, 5, 22 / ×
14, 5, 23 / /
14, 5, 24 / ×
14, 5, 25 / ×
14, 5, 26 / ×
14, 5, 27 / /
14, 5, 28 / ×
14, 7, 20 / ×
14, 7, 21 / ×
14, 7, 22 / ×
14, 7, 23 / /
14, 7, 24 / ×
14, 7, 25 / /
PAIR OF
NUMBERS
RELATIVELY
PRIME
PAIRWISE
RELATIVELY
PRIME
14, 7, 26 / ×
14, 7, 27 / ×
14, 7, 28 / ×
14, 9, 20 / ×
14, 9, 21 / ×
14, 9, 22 / ×
14, 9, 23 / /
14, 9, 24 / ×
14, 9, 25 / /
14, 9, 26 / ×
14, 9, 27 / ×
14, 9, 28 / ×
14, 11, 20 / ×
14, 11, 21 / ×
14, 11, 22 / ×
14, 11, 23 / /
14, 11, 24 / ×
14, 11, 25 / /
14, 11, 26 / ×
14, 11, 27 / /
14, 11, 28 / ×
14, 13, 20 / ×
14, 13, 21 / ×
14, 13, 22 / ×
14, 13, 23 / /
14, 13, 24 / ×
14, 13, 25 / /
14, 13, 26 / ×
14, 13, 27 / /
14, 13, 28 / ×

7. PAIR OF
NUMBERS
RELATIVELY
PRIME
PAIRWISE
RELATIVELY
PRIME
14, 15, 20 / ×
14, 15, 21 / ×
14, 15, 22 / ×
14, 15, 23 / ×
14, 15, 24 / ×
14, 15, 25 / ×
14, 15, 26 / ×
14, 15, 27 / /
14, 15, 28 / ×
14, 17, 20 / ×
14, 17, 21 / ×
14, 17, 22 / ×
14, 17, 23 / /
14, 17, 24 / ×
14, 17, 25 / /
14, 17, 26 / ×
14, 17, 27 / /
14, 17, 28 / ×
14, 19, 20 / ×
14, 19, 21 / /
14, 19, 22 / ×
14, 19, 23 / /
14, 19, 24 / ×
14, 19, 25 / /
14, 19, 26 / ×
14,19, 27 / /
14, 19, 28 / ×
16, 3, 20 / ×
16, 3, 21 / ×
16, 3, 22 / ×
PAIR OF
NUMBERS
RELATIVELY
PRIME
PAIRWISE
RELATIVELY
PRIME
16, 3, 23 / /
16, 3, 24 / ×
16, 3, 25 / /
16, 3, 26 / ×
16, 3, 27 / ×
16, 3, 28 / ×
16, 5, 20 / ×
16, 5, 21 / /
16, 5, 22 / ×
16, 5, 23 / /
16, 5, 24 / ×
16, 5, 25 / ×
16, 5, 26 / ×
16, 5, 27 / /
16, 5, 28 / ×
16, 7, 20 / ×
16, 7, 21 / ×
16, 7, 22 / ×
16, 7, 23 / /
16, 7, 24 / ×
16, 7, 25 / /
16, 7, 26 / ×
16, 7, 27 / /
16, 7, 28 / ×
16, 9, 20 / ×
16, 9, 21 / ×
16, 9, 22 / ×
16, 9, 23 / /
16, 9, 24 / ×
16, 9, 25 / /
PAIR OF
NUMBERS
RELATIVELY
PRIME
PAIRWISE
RELATIVELY
PRIME
16, 9, 26 / ×
16, 9, 27 / ×
16, 9, 28 / ×
16, 11, 20 / ×
16, 11, 21 / /
16, 11, 22 / ×
16, 11, 23 / /
16, 11, 24 / ×
16, 11, 25 / /
16, 11, 26 / ×
16, 11, 27 / /
16, 11, 28 / ×
16, 13, 20 / ×
16, 13, 21 / /
16, 13, 22 / ×
16, 13, 23 / /
16, 13, 24 / ×
16, 13, 25 / /
16, 13, 26 / ×
16, 13, 27 / /
16, 13, 28 / ×
16, 15, 20 / ×
16, 15, 21 / ×
16, 15, 22 / ×
16, 15, 23 / /
16, 15, 24 / ×
16, 15, 25 / ×
16, 15, 26 / ×
16, 15, 27 / ×
16, 15, 28 / ×

8. PAIR OF
NUMBERS
RELATIVELY
PRIME
PAIRWISE
RELATIVELY
PRIME
16, 17, 20 / ×
16, 17, 21 / /
16, 17, 22 / ×
16, 17, 23 / /
16, 17, 24 / ×
16, 17, 25 / /
16, 17, 26 / ×
16, 17, 27 / /
16, 17, 28 / ×
16, 19, 20 / ×
16, 19, 21 / /
16, 19, 22 / ×
16, 19, 23 / /
16, 19, 24 / ×
16, 19, 25 / /
16, 19, 26 / ×
16,19, 27 / /
16, 19, 28 / ×
18, 3, 20 / ×
18, 3, 21 / ×
18, 3, 22 / ×
18, 3, 23 / /
18, 3, 24 / ×
18, 3, 25 / /
18,3, 26 / ×
18, 3, 27 / ×
18, 3, 28 / ×
18, 5, 20 / ×
18, 5, 21 / ×
18, 5, 22 / ×
PAIR OF
NUMBERS
RELATIVELY
PRIME
PAIRWISE
RELATIVELY
PRIME
18, 5, 23 / /
18, 5, 24 / ×
18, 5, 25 / ×
18, 5, 26 / ×
18, 5, 27 / ×
18, 5, 28 / ×
18, 7, 20 / ×
18, 7, 21 / ×
18, 7, 22 / ×
18, 7, 23 / /
18, 7, 24 / ×
18, 7, 25 / /
18, 7, 26 / ×
18, 7, 27 / ×
18, 7, 28 / ×
18, 9, 20 / ×
18, 9, 21 / ×
18, 9, 22 / ×
18, 9, 23 / ×
18, 9, 24 / ×
18, 9, 25 / ×
18, 9, 26 / ×
18, 9, 27 / ×
18, 9, 28 / ×
18, 11, 20 / ×
18, 11, 21 / ×
18, 11, 22 / ×
18, 11, 23 / /
18, 11, 24 / ×
18, 11, 25 / /
PAIR OF
NUMBERS
RELATIVELY
PRIME
PAIRWISE
RELATIVELY
PRIME
18, 11, 26 / ×
18, 11, 27 / ×
18, 11, 28 / ×
18, 13, 20 / ×
18, 13, 21 / ×
18, 13, 22 / ×
18, 13, 23 / /
18, 13, 24 / ×
18, 13, 25 / /
18, 13, 26 / ×
18, 13, 27 / ×
18, 13, 28 / ×
18 15, 20 / ×
18, 15, 21 / ×
18, 15, 22 / ×
18, 15, 23 / /
18, 15, 24 / ×
18, 15, 25 / ×
18, 15, 26 / ×
18, 15, 27 / ×
18, 15, 28 / ×
18, 17, 20 / ×
18, 17, 21 / ×
18, 17, 22 / ×
18, 17, 23 / /
18, 17, 24 / ×
18, 17, 25 / ×
18, 17, 26 / ×
18, 17, 27 / /
18, 17, 28 / ×

9. PAIR OF
NUMBERS
RELATIVELY
PRIME
PAIRWISE
RELATIVELY
PRIME
18, 19, 20 / ×
18, 19, 21 / ×
18, 19, 22 / ×
18, 19, 23 / /
18, 19, 24 / ×
18, 19, 25 / /
18, 19, 26 / ×
18,19, 27 / ×
18, 19, 28 / ×
 Relatively prime or pairwise
relatively prime
X = not pairwise relatively prime