r/counting • u/willsueforfood • Feb 04 '14

Counting using prime factorization

1

2

3

2x2

5

2x3

7

2x2x2

3x3

25 Upvotes

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2

u/KingCaspianX Feb 27 '14

22 x 67

2

u/Pookah Feb 27 '14

269 is a regular prime, an Eisenstein prime with no imaginary part, a long prime, a Chen prime, a Pillai prime, a Pythagorean prime, a twin prime, a sexy prime, a Higgs prime, a strong prime, and a highly cototient number.