Math Olympiad
All 46 primes under 200 and why 0 and 1 are not prime.
Prime Numbers Under 200
A prime number has exactly two factors: 1 and itself. Learn all 46 primes below 200, plus why 0 and 1 are not prime.
0 is not a prime number because it has infinite factors.
1 is not a prime number because it has only one factor: itself.
2 is a prime number — it has exactly two factors: 1 and 2.
3 is a prime number — it has exactly two factors: 1 and 3.
5 is a prime number — it has exactly two factors: 1 and 5.
7 is a prime number — it has exactly two factors: 1 and 7.
11 is a prime number — it has exactly two factors: 1 and 11.
13 is a prime number — it has exactly two factors: 1 and 13.
17 is a prime number — it has exactly two factors: 1 and 17.
19 is a prime number — it has exactly two factors: 1 and 19.
23 is a prime number — it has exactly two factors: 1 and 23.
29 is a prime number — it has exactly two factors: 1 and 29.
31 is a prime number — it has exactly two factors: 1 and 31.
37 is a prime number — it has exactly two factors: 1 and 37.
41 is a prime number — it has exactly two factors: 1 and 41.
43 is a prime number — it has exactly two factors: 1 and 43.
47 is a prime number — it has exactly two factors: 1 and 47.
53 is a prime number — it has exactly two factors: 1 and 53.
59 is a prime number — it has exactly two factors: 1 and 59.
61 is a prime number — it has exactly two factors: 1 and 61.
67 is a prime number — it has exactly two factors: 1 and 67.
71 is a prime number — it has exactly two factors: 1 and 71.
73 is a prime number — it has exactly two factors: 1 and 73.
79 is a prime number — it has exactly two factors: 1 and 79.
83 is a prime number — it has exactly two factors: 1 and 83.
89 is a prime number — it has exactly two factors: 1 and 89.
97 is a prime number — it has exactly two factors: 1 and 97.
101 is a prime number — it has exactly two factors: 1 and 101.
103 is a prime number — it has exactly two factors: 1 and 103.
107 is a prime number — it has exactly two factors: 1 and 107.
109 is a prime number — it has exactly two factors: 1 and 109.
113 is a prime number — it has exactly two factors: 1 and 113.
127 is a prime number — it has exactly two factors: 1 and 127.
131 is a prime number — it has exactly two factors: 1 and 131.
137 is a prime number — it has exactly two factors: 1 and 137.
139 is a prime number — it has exactly two factors: 1 and 139.
149 is a prime number — it has exactly two factors: 1 and 149.
151 is a prime number — it has exactly two factors: 1 and 151.
157 is a prime number — it has exactly two factors: 1 and 157.
163 is a prime number — it has exactly two factors: 1 and 163.
167 is a prime number — it has exactly two factors: 1 and 167.
173 is a prime number — it has exactly two factors: 1 and 173.
179 is a prime number — it has exactly two factors: 1 and 179.
181 is a prime number — it has exactly two factors: 1 and 181.
191 is a prime number — it has exactly two factors: 1 and 191.
193 is a prime number — it has exactly two factors: 1 and 193.
197 is a prime number — it has exactly two factors: 1 and 197.
199 is a prime number — it has exactly two factors: 1 and 199.