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PHP mt_rand() Randomosity Tester

TIMEOUT
+443,651 data
+1 +10 +100 +1K +10K +MAX
range: 1-10,000, data points: 443,652, groups: 49
High / Low / Range / Average
Frequency: 73 / 21 / 52 / 44.37
Rows: 635 / 1 / 634 / 204.08
Frequency
Rows
73
1
72
1
70
1
68
2
67
3
66
2
65
10
64
11
63
13
62
21
61
33
60
45
59
56
58
79
57
104
56
134
55
175
54
204
53
207
52
299
51
350
50
415
49
427
48
486
47
574
46
548
45
583
44
635
43
598
42
569
41
546
40
524
39
476
38
388
37
332
36
297
35
222
34
168
33
143
32
108
31
72
30
62
29
30
28
15
27
20
26
3
25
5
24
1
21
2

Test runs: 443,652Avg run : 0.000003 seconds Test time: 1.383780 seconds Data Save: 0.520499 seconds Test Tools: Restart test: Random range 1 to: 1 2 3 4 5 10 50 100 500 1K 5K 10K 50K 100K Random Generator Method: SQLite ORDER BY RANDOM() PHP rand() PHP mt_rand() PHP random_int() Back to top

About the Randomosity Tester

This page tests the frequency distribution and timing of random number generation via these methods:

Random number results are stored in a test table. The test table is defined as:

CREATE TABLE 'test' ( 'id' INTEGER PRIMARY KEY, 'frequency' INTEGER DEFAULT '0' );

The table is initialized by creating all rows with frequency = 0. The number of rows in the table is defined by the range setting. The current test is set to use range: 1 to 10,000.

For each random number chosen, the table is updated via:

UPDATE test SET frequency = frequency + 1 WHERE id = :random_number

For SQLite tests, results are individually generated via the SQL call:

SELECT id FROM test ORDER BY RANDOM() LIMIT 1;

Generate more random numbers by clicking a  +  number button to start a test run.

Each test run is limted to ~1.42 seconds.

A Frequency of Frequencies chart displays:

This site was created with Open Source software. Find out more on Github: randomosity-tester v0.2.2

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