Admin8888 - Source

The number 8 holds significant cultural weight in East Asian numerology, symbolizing prosperity, wealth, and good fortune. Repeating the number four times (8888) amplifies this luck. During the early 2000s boom of DIY website builders, many developers hardcoded "admin8888" as a default credential because it was:

For commercial sites, a breach via default credentials like admin8888 is considered gross negligence under regulations like GDPR, CCPA, or PCI-DSS, leading to heavy fines. source admin8888