Is Malaysia 4D Fair?

Chi-square randomness test · 1985–2026 · 151 operator-years checked

19 operator-year(s) stand out and are listed below for review.

This isn't proof of anything either way — it's an ongoing statistical check. A truly fair machine should still occasionally produce an unusual year by chance, and a real bias would show up as p-values repeatedly crashing toward zero.

How this works

For each operator and calendar year we pool the four digit positions of every winning number and run a chi-square goodness-of-fit test against a perfectly uniform distribution (each digit 0–9 equally likely). A high p-value means the digits look random; a very low one means they don't.

Because we run hundreds of tests, roughly 1 in 20 will show p < 0.05 by pure chance — so a low p-value alone means nothing. We apply a Benjamini-Hochberg false-discovery-rate correction across the whole family of tests and only flag (red) the windows that survive it.

Magnum 4D12 flagged
1985p = 0.052026
Da Ma Cai1 flagged
1990p = 0.052026
Sports Totoconsistent with fair
1992p = 0.052026
CashSweepconsistent with fair
2017p = 0.052026
Sabah 88consistent with fair
2017p = 0.052026
STC 4D3 flagged
2017p = 0.052026
Grand Dragon3 flagged
2020p = 0.052026

Windows flagged for review

Survived the FDR correction — worth a closer look (and a check that it isn't a data-capture error on our side).

OperatorYearχ²p-valueDigits tested
Magnum 4D198652.8<0.000114,536
Magnum 4D198744.7<0.000114,608
Magnum 4D198862.8<0.000114,532
Magnum 4D198952.4<0.000114,532
Magnum 4D199055.8<0.000114,712
Magnum 4D199166.3<0.000114,444
Magnum 4D199262.3<0.000114,428
Da Ma Cai199326.10.002014,336
Magnum 4D199331.60.000214,348
Grand Dragon202140.2<0.000133,560
Magnum 4D202123.60.005011,592
Magnum 4D202231.90.000216,460
Grand Dragon202328.30.000933,568
Magnum 4D202437.0<0.000115,172
STC 4D202426.10.002014,996
Grand Dragon202538.5<0.000133,564
Magnum 4D202528.40.000815,180
STC 4D202528.00.000915,180
STC 4D202636.8<0.00018,556

Independent analysis for reference. OngLai4D is not affiliated with any operator. Numbers are drawn from our archive of published results.