From https://en.wikipedia.org/wiki/400_(number)#421 :
- A prime number,
- sum of five consecutive primes (73 + 79 + 83 + 89 + 97),
- centered square number,
Also:
- SMTP code meaning the transmission channel will be closing
- a famous French dice game
Here’s Q Drop #421: https://qalerts.app/?q=%23421
See you tomorrow, Frens!🤓
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