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This is in the spirit of the What is a Word/Phrase™ series started by JLee with a special brand of Phrase™ and Word™ puzzles.

If a number conforms to a special rule, I call it a Scary Number™.
Use the following examples below to find the rule.

Scary Numbers™
-1555487920
-739891358
-142598657
-70140871
-1671766
4450548
17452800
84508223
272393477
598734170
730747057
798300167
1000212371
1506920732

"What about Non-Scary Numbers™?" I hear you ask.

Fortunately, the vast majority of numbers are Non-Scary Numbers™. However, I'm more than willing to check for you if your number is Scary or not.

And, if you want to analyze, here is a CSV version:

Scary Numbers

-1555487920 
-739891358  
-142598657  
-70140871   
-1671766    
4450548      
17452800     
84508223     
272393477    
598734170    
730747057    
798300167    
1000212371   
1506920732
Improve this question
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  • 1
    $\begingroup$ One big reason that usually Non-X examples are provided is to prevent the puzzle from devolving into an off-topic semi-interactive guessing game. Can this puzzle be solved in its current state? $\endgroup$
    – bobble
    Commented Jul 20, 2021 at 15:23
  • 1
    $\begingroup$ @bobble Yes, it can be solved. Explaining why actually kind of acts as a hint, so I won't do that right now. For now, I would say that knowing what some Non-Scary Numbers are is almost completely useless to the solution. $\endgroup$
    – Jerry Dean
    Commented Jul 20, 2021 at 15:31

1 Answer 1

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A scary number is

A timestamp of a date where a terrorist attacks happened

For example (more to come):

-1555487920

September 16, 1920 : Wall street bombing

-739891358

July 22, 1946 : King David Hotel bombing

-142598657

June 25, 1965 : Saigon bombing

-70140871

October 12, 1967 : Cyprus Airways Flight 284 bombing

-1671766

December 12, 1969 : Piazza Fontana bombing

4450548

February 21, 1970 : Swissair Flight 330 bombing

17452800

July 22, 1970 : Olympic Airways Flight 255 hijacking

84508223

September 5, 1972 : Munich_massacre

272393477

August 19, 1978 : Cinema Rex fire

598734170

December 21, 1988 : Pan Am Flight 103 bombing

730747057

February 26, 1993: 1993 World Trade Center bombing

798300167

April 19, 1995 : Oklahoma City bombing

1000212371

September 11, 2001 : September 11 attacks

1506920732

October 1, 2017 (though the timestamp is on the 2nd): 2017 Las Vegas shooting

As another exemple, I find the number 1447391132 quite scary too.

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  • $\begingroup$ That is correct! The reason why the 2017 Las Vegas shooting is on the 2nd is because I converted the time to UTC. $\endgroup$
    – Jerry Dean
    Commented Jul 21, 2021 at 13:24

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