683

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Number

$683$ (six hundred and eighty-three) is:

The $124$th prime number

The smaller of the $8$th pair of primes whose prime gap is $8$:

$691 - 683 = 8$

The $31$st Sophie Germain prime after $2$, $3$, $5$, $11$, $23$, $29$, $41$, $\ldots$, $233$, $239$, $251$, $281$, $293$, $359$, $419$, $431$, $443$, $491$, $509$, $593$, $641$, $653$, $659$:

$2 \times 683 + 1 = 1367$, which is prime.

The $42$nd left-truncatable prime after $2$, $3$, $5$, $7$, $\ldots$, $443$, $467$, $523$, $547$, $613$, $617$, $643$, $647$, $653$, $673$

Also see

• Previous  ... Next: Prime Gaps of 8
• Previous  ... Next: Sophie Germain Prime
• Previous  ... Next: Left-Truncatable Prime
• Previous  ... Next: Prime Number