Prime numbers

Script

#!/usr/local/bin/python3.1
import time

def fib(n):
    """Print a Fibonacci series up to n."""
    a, b = 0, 1
    while b < n:
        print(b),
        time.sleep(1),
        a, b = b, a + b

# Now call the function we just defined:
fib(12345678)

Execution

2 is a prime number
3 is a prime number
4 equals 2 * 2
5 is a prime number
6 equals 2 * 3
7 is a prime number
8 equals 2 * 4
9 equals 3 * 3
10 equals 2 * 5
11 is a prime number
12 equals 2 * 6
13 is a prime number
14 equals 2 * 7
15 equals 3 * 5
16 equals 2 * 8
17 is a prime number
18 equals 2 * 9
19 is a prime number
20 equals 2 * 10
21 equals 3 * 7
22 equals 2 * 11
23 is a prime number
24 equals 2 * 12
25 equals 5 * 5
26 equals 2 * 13
27 equals 3 * 9
28 equals 2 * 14
29 is a prime number
30 equals 2 * 15
31 is a prime number
32 equals 2 * 16
33 equals 3 * 11
34 equals 2 * 17
35 equals 5 * 7
36 equals 2 * 18
37 is a prime number
38 equals 2 * 19
39 equals 3 * 13
40 equals 2 * 20
41 is a prime number
42 equals 2 * 21
43 is a prime number
44 equals 2 * 22
45 equals 3 * 15
46 equals 2 * 23
47 is a prime number
48 equals 2 * 24
49 equals 7 * 7
50 equals 2 * 25
51 equals 3 * 17
52 equals 2 * 26
53 is a prime number
54 equals 2 * 27
55 equals 5 * 11
56 equals 2 * 28
57 equals 3 * 19
58 equals 2 * 29
59 is a prime number
60 equals 2 * 30
61 is a prime number
62 equals 2 * 31
63 equals 3 * 21
64 equals 2 * 32
65 equals 5 * 13
66 equals 2 * 33
67 is a prime number
68 equals 2 * 34
69 equals 3 * 23
70 equals 2 * 35
71 is a prime number
72 equals 2 * 36
73 is a prime number
74 equals 2 * 37
75 equals 3 * 25
76 equals 2 * 38
77 equals 7 * 11
78 equals 2 * 39
79 is a prime number
80 equals 2 * 40
81 equals 3 * 27
82 equals 2 * 41
83 is a prime number
84 equals 2 * 42
85 equals 5 * 17
86 equals 2 * 43
87 equals 3 * 29
88 equals 2 * 44
89 is a prime number
90 equals 2 * 45
91 equals 7 * 13
92 equals 2 * 46
93 equals 3 * 31
94 equals 2 * 47
95 equals 5 * 19
96 equals 2 * 48
97 is a prime number
98 equals 2 * 49
99 equals 3 * 33
100 equals 2 * 50
101 is a prime number
102 equals 2 * 51
103 is a prime number
104 equals 2 * 52
105 equals 3 * 35
106 equals 2 * 53
107 is a prime number
108 equals 2 * 54
109 is a prime number
110 equals 2 * 55
111 equals 3 * 37
112 equals 2 * 56
113 is a prime number
114 equals 2 * 57
115 equals 5 * 23
116 equals 2 * 58
117 equals 3 * 39
118 equals 2 * 59
119 equals 7 * 17
120 equals 2 * 60
121 equals 11 * 11
122 equals 2 * 61
123 equals 3 * 41
124 equals 2 * 62
125 equals 5 * 25
126 equals 2 * 63
127 is a prime number
128 equals 2 * 64
129 equals 3 * 43
130 equals 2 * 65
131 is a prime number
132 equals 2 * 66
133 equals 7 * 19
134 equals 2 * 67
135 equals 3 * 45
136 equals 2 * 68
137 is a prime number
138 equals 2 * 69
139 is a prime number
140 equals 2 * 70
141 equals 3 * 47
142 equals 2 * 71
143 equals 11 * 13
144 equals 2 * 72
145 equals 5 * 29
146 equals 2 * 73
147 equals 3 * 49
148 equals 2 * 74
149 is a prime number
150 equals 2 * 75
151 is a prime number
152 equals 2 * 76
153 equals 3 * 51
154 equals 2 * 77
155 equals 5 * 31
156 equals 2 * 78
157 is a prime number
158 equals 2 * 79
159 equals 3 * 53
160 equals 2 * 80
161 equals 7 * 23
162 equals 2 * 81
163 is a prime number
164 equals 2 * 82
165 equals 3 * 55
166 equals 2 * 83
167 is a prime number
168 equals 2 * 84
169 equals 13 * 13
170 equals 2 * 85
171 equals 3 * 57
172 equals 2 * 86
173 is a prime number
174 equals 2 * 87
175 equals 5 * 35
176 equals 2 * 88
177 equals 3 * 59
178 equals 2 * 89
179 is a prime number
180 equals 2 * 90
181 is a prime number
182 equals 2 * 91
183 equals 3 * 61
184 equals 2 * 92
185 equals 5 * 37
186 equals 2 * 93
187 equals 11 * 17
188 equals 2 * 94
189 equals 3 * 63
190 equals 2 * 95
191 is a prime number
192 equals 2 * 96
193 is a prime number
194 equals 2 * 97
195 equals 3 * 65
196 equals 2 * 98
197 is a prime number
198 equals 2 * 99
199 is a prime number
200 equals 2 * 100
201 equals 3 * 67
202 equals 2 * 101
203 equals 7 * 29
204 equals 2 * 102
205 equals 5 * 41
206 equals 2 * 103
207 equals 3 * 69
208 equals 2 * 104
209 equals 11 * 19
210 equals 2 * 105
211 is a prime number
212 equals 2 * 106
213 equals 3 * 71
214 equals 2 * 107
215 equals 5 * 43
216 equals 2 * 108
217 equals 7 * 31
218 equals 2 * 109
219 equals 3 * 73
220 equals 2 * 110
221 equals 13 * 17
222 equals 2 * 111
223 is a prime number
224 equals 2 * 112
225 equals 3 * 75
226 equals 2 * 113
227 is a prime number
228 equals 2 * 114
229 is a prime number
230 equals 2 * 115
231 equals 3 * 77
232 equals 2 * 116
233 is a prime number
234 equals 2 * 117
235 equals 5 * 47
236 equals 2 * 118
237 equals 3 * 79
238 equals 2 * 119
239 is a prime number
240 equals 2 * 120
241 is a prime number
242 equals 2 * 121
243 equals 3 * 81
244 equals 2 * 122
245 equals 5 * 49
246 equals 2 * 123
247 equals 13 * 19
248 equals 2 * 124
249 equals 3 * 83
250 equals 2 * 125
251 is a prime number
252 equals 2 * 126
253 equals 11 * 23
254 equals 2 * 127
255 equals 3 * 85
256 equals 2 * 128
257 is a prime number
258 equals 2 * 129
259 equals 7 * 37
260 equals 2 * 130
261 equals 3 * 87
262 equals 2 * 131
263 is a prime number
264 equals 2 * 132
265 equals 5 * 53
266 equals 2 * 133
267 equals 3 * 89
268 equals 2 * 134
269 is a prime number
270 equals 2 * 135
271 is a prime number
272 equals 2 * 136
273 equals 3 * 91
274 equals 2 * 137
275 equals 5 * 55
276 equals 2 * 138
277 is a prime number
278 equals 2 * 139
279 equals 3 * 93
280 equals 2 * 140
281 is a prime number
282 equals 2 * 141
283 is a prime number
284 equals 2 * 142
285 equals 3 * 95
286 equals 2 * 143
287 equals 7 * 41
288 equals 2 * 144
289 equals 17 * 17
290 equals 2 * 145
291 equals 3 * 97
292 equals 2 * 146
293 is a prime number
294 equals 2 * 147
295 equals 5 * 59
296 equals 2 * 148
297 equals 3 * 99
298 equals 2 * 149
299 equals 13 * 23