Quark

Prime factors

Partial harmonic fraction

Prime factor composites

u

2, 3, 5

9/10

(3 × 3)/(2 × 5)

d

2, 5, 11

10/11

(2 × 5)/(11)

s

2, 3, 7

27/28

(3 × 3 × 3)/(2 × 2 × 7)

c

2, 5, 11

110/109

(2 × 5 × 11)/(109)

b

2, 3, 11

33/32

(3 × 11)/(2 × 2 × 2 × 2)

t

2, 5, 11

11/10

(11)/(2 × 5)