7109

This number is a prime.

+ The longest recorded prison sentences were given in 1969 to two "confidence tricksters" in Iran: 7109 years (from Norris and Ross McWhirter's 10 Best Oddities and Fun Trivia).

+ 7109 of the first billion primes become squares by subtracting their prime indices from them. [Gaydos]

(There is one curio for this number that has not yet been approved by an editor.)

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